Help with a program i'm writing

I'm trying to write a program for a golf leader board. It currently accepts player names from an input file, and puts them inot an array. it also does the same thing with the hole details. The players are sorted into pairs. I can add scores to each player, and increment which hole they are on. I now need to do a par score (e.g. -1) based on the par of a hole, and the no of shots a player has played on that hole.
I know that in order for anyone to help me with this, they will need to see the code i have already written. If you do think you can help me, either send me an email and i'll forward the code on, or post here asking for the code and i'll do the send it by email.
Thanks all

The reason that i am asking for help, is not because i work for some one and am trying to steal their money, but because this is a college assignment, and i am not the greatest java programmer in the world.
The reason why i haven't posted the code here is because it's over 500 lines long, and i reckon that may be a bit big to put in a message.
As for the maths, i have no problem with the maths, i just can't code the flaming thing.
If there is anyone who does think they can help and is willing to i would greatly appreciate it.
Cheers

Similar Messages

Help with a Program I am writing! Please!

Hello All,
This is my first post...I hope to find some answers to my program I am writing! A couple things first - I am 17, and have designed a comp. science class for myself to take while a senior in high school, since there was not one offered. My end of the 2nd term project is to write a program that encompasses the information I have learned about for the past two terms. I know the very basics, if that. Please help!
My program involves the simple dice throwing program, 'Dice Thrower' by Kevin Boone. The full text/program write out can be found at:
http://www.kevinboone.com/PF_DiceThrower-java.html
I am hoping to add a part to this program that basically tells the program if the dice show doubles, pop up a little GUI window that says "You are a Winner! You Got Doubles!"
I was thinking as I finished chapter 7 in my text book, that either an 'if/else' or 'switch' statement might be the right place to start.
Could someone please write me a start to the program text that I need to add to 'Dice Thrower', or explain what I need to do to get started! Thank you so much, I really appreciate it.
Erick DeVore - Eroved Kcire

import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JLabel;
import javax.swing.JFrame;
import java.awt.FlowLayout;
import java.awt.Color;
public class DiceThrower extends Applet
Die die1;
Die die2;
public void paint (Graphics g)
     die1.draw(g);
     die2.draw(g);
     g.drawString ("Click mouse anywhere", 55, 140);
     g.drawString ("to throw dice again", 65, 160);
public void init()
     die1 = new Die();
     die2 = new Die();
     die1.setTopLeftPosition(20, 20);
     die2.setTopLeftPosition(150, 20);
     throwBothDice();
     // Erick's Program Insert below
     public class WinnerGui extends JFrame;
public WinnerGui();
    super ("You Are The Winner with GUI");
    Container c = getContentPane();
    c.setBackground(Color.lightGray);
    c.setLayout(new FlowLayout());
    c.add(new JLabel("You're a Winner! You Got Doubles!"));
        //End Erick's Program insert
     DiceThrowerMouseListener diceThrowerMouseListener =
          new DiceThrowerMouseListener();
     diceThrowerMouseListener.setDiceThrower(this);
     addMouseListener(diceThrowerMouseListener);
public void throwBothDice();
     die1.throwDie();
     die2.throwDie();
     repaint();
class Die
int topLeftX;
int topLeftY;
int numberShowing = 6;
final int spotPositionsX[] = {0, 60, 0, 30, 60, 0, 60};
final int spotPositionsY[] = {0, 0, 30, 30, 30, 60, 60};
public void setTopLeftPosition(final int _topLeftX, final int _topLeftY)
     topLeftX = _topLeftX;
     topLeftY = _topLeftY;
public void throwDie()
     numberShowing = (int)(Math.random() * 6 + 1);
public void draw(Graphics g)
     switch(numberShowing)
          case 1:
               drawSpot(g, 3);
               break;
          case 2:
               drawSpot(g, 0);
               drawSpot(g, 6);
               break;
          case 3:
               drawSpot(g, 0);
               drawSpot(g, 3);
               drawSpot(g, 6);
               break;
          case 4:
               drawSpot(g, 0);
               drawSpot(g, 1);
               drawSpot(g, 5);
               drawSpot(g, 6);
               break;
          case 5:
               drawSpot(g, 0);
               drawSpot(g, 1);
               drawSpot(g, 3);
               drawSpot(g, 5);
               drawSpot(g, 6);
               break;
          case 6:
               drawSpot(g, 0);
               drawSpot(g, 1);
               drawSpot(g, 2);
               drawSpot(g, 4);
               drawSpot(g, 5);
               drawSpot(g, 6);
               break;
void drawSpot(Graphics g, final int spotNumber)
     g.fillOval(topLeftX + spotPositionsX[spotNumber],
          topLeftY + spotPositionsY[spotNumber], 20, 20);
class DiceThrowerMouseListener extends MouseAdapter
DiceThrower diceThrower;
public void mouseClicked (MouseEvent e)
     diceThrower.throwBothDice();
public void setDiceThrower(DiceThrower _diceThrower)
     diceThrower = _diceThrower;
}That was what I have dwindled it down to, using my knowledge, as well as others' expertise...however I am listening to what you say, and get these messages when I try to compile in the CMD:
line 63 - illegal start of expression (carrot at p in public)
line 63 - ; expected (carrot at c in class)
line 63 - { expected (carrot at ; at end of line)
line 65 - illegal start of expression (carrot at p in public)
line 83 - <identifier> expected (carrot as: (this) ) -- I don't even know what that means ^
line 84 - invalid method declaration; return type required (carrot at a in add)
line 84 - <identifier> expected (carrot like this: [see below])
addMouseListener(diceThrowerMouseListener);
^
line 84 - ) expected (carrot is one place over from previous spot [see above]
line 93 - illegal start of expression (carrot at p in public)
I know this seems like a lot of errors, but believe it or not, I actually had it up in the high teens and was able to fix some of them myself from going by previous examples, as well as looking things up in my text book. If anyone has any suggestions concerning the syntax errors of the code, please please let me know and I will work my hardest to fix them...thank you all so much for helping.
Erick

Help with Paint program.

Hello. I am somewhat new to Java and I was recently assigned to do a simple paint program. I have had no trouble up until my class started getting into the graphical functions of Java. I need help with my program. I am supposed to start off with a program that draws lines and changes a minimum of 5 colors. I have the line function done but my color change boxes do not work and I am able to draw inside the box that is supposed to be reserved for color buttons. Here is my code so far:
// Lab13110.java
// The Lab13 program assignment is open ended.
// There is no provided student version for starting, nor are there
// any files with solutions for the different point versions.
// Check the Lab assignment document for additional details.
import java.applet.Applet;
import java.awt.*;
public class Lab13110 extends Applet
     int[] startX,startY,endX,endY;
     int currentStartX,currentStartY,currentEndX,currentEndY;
     int lineCount;
     Rectangle red, green, blue, yellow, black;
     int numColor;
     Image virtualMem;
     Graphics gBuffer;
     int rectheight,rectwidth;
     public void init()
          startX = new int[100];
          startY = new int[100];
          endX = new int[100];
          endY = new int[100];
          lineCount = 0;
          red = new Rectangle(50,100,25,25);
          green = new Rectangle(50,125,25,25);
          blue = new Rectangle(50,150,25,25);
          yellow = new Rectangle(25,112,25,25);
          black = new Rectangle(25,137,25,25);
          numColor = 0;
          virtualMem = createImage(100,600);
          gBuffer = virtualMem.getGraphics();
          gBuffer.drawRect(0,0,100,600);
     public void paint(Graphics g)
          for (int k = 0; k < lineCount; k++)
               g.drawLine(startX[k],startY[k],endX[k],endY[k]);
          g.drawLine(currentStartX,currentStartY,currentEndX,currentEndY);
          g.setColor(Color.red);
          g.fillRect(50,100,25,25);
          g.setColor(Color.green);
          g.fillRect(50,125,25,25);
          g.setColor(Color.blue);
          g.fillRect(50,150,25,25);
          g.setColor(Color.yellow);
          g.fillRect(25,112,25,25);
          g.setColor(Color.black);
          g.fillRect(25,137,25,25);
          switch (numColor)
               case 1:
                    g.setColor(Color.red);
                    break;
               case 2:
                    g.setColor(Color.green);
                    break;
               case 3:
                    g.setColor(Color.blue);
                    break;
               case 4:
                    g.setColor(Color.yellow);
                    break;
               case 5:
                    g.setColor(Color.black);
                    break;
               case 6:
                    g.setColor(Color.black);
                    break;
          g.setColor(Color.black);
          g.drawRect(0,0,100,575);
     public boolean mouseDown(Event e, int x, int y)
          currentStartX = x;
          currentStartY = y;
          if(red.inside(x,y))
               numColor = 1;
          else if(green.inside(x,y))
               numColor = 2;
          else if(blue.inside(x,y))
               numColor = 3;
          else if(yellow.inside(x,y))
               numColor = 4;
          else if(black.inside(x,y))
               numColor = 5;
          else
               numColor = 6;
          repaint();
          return true;
     public boolean mouseDrag(Event e, int x, int y)
          int Rectheight = 500;
          int Rectwidth = 900;
          currentEndX = x;
          currentEndY = y;
          Rectangle window = new Rectangle(0,0,900,500);
          //if (window.inside(Rectheight,Rectwidth))
               repaint();
          return true;
     public boolean mouseUp(Event e, int x, int y)
          int Rectheight = 500;
          int Rectwidth = 900;
          startX[lineCount] = currentStartX;
          startY[lineCount] = currentStartY;
          endX[lineCount] = x;
          endY[lineCount] = y;
          lineCount++;
          Rectangle window = new Rectangle(0,0,900,500);
          if (window.inside(Rectheight,Rectwidth))
               repaint();
          return true;
     public void Rectangle(Graphics g, int x, int y)
          g.setColor(Color.white);
          Rectangle screen = new Rectangle(100,0,900,600);
}If anyone could point me in the right direction of how to go about getting my buttons to work and fixing the button box, I would be greatly appreciative. I just need to get a little bit of advice and I think I should be good after I get this going.
Thanks.

This isn't in any way a complete solution, but I'm posting code for a mouse drag outliner. This may be preferable to how you are doing rectangles right now
you are welcome to use and modify this code but please do not change the package and make sure that you tell your teacher where you got it from
MouseDragOutliner.java
package tjacobs.ui;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Stroke;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
* See the public static method addAMouseDragOutliner
public class MouseDragOutliner extends MouseAdapter implements MouseMotionListener {
     public static final BasicStroke DASH_STROKE = new BasicStroke(1.0f, BasicStroke.CAP_SQUARE, BasicStroke.JOIN_BEVEL, 10.0f, new float[] {8, 8}, 0);
     private boolean mUseMove = false;
     private Point mStart;
     private Point mEnd;
     private Component mComponent;
     private MyRunnable mRunner= new MyRunnable();
     private ArrayList mListeners = new ArrayList(1);
     public MouseDragOutliner() {
          super();
     public MouseDragOutliner(boolean useMove) {
          this();
          mUseMove = useMove;
     public void mouseDragged(MouseEvent me) {
          doMouseDragged(me);
     public void mousePressed(MouseEvent me) {
          mStart = me.getPoint();
     public void mouseEntered(MouseEvent me) {
          mStart = me.getPoint();
     public void mouseReleased(MouseEvent me) {
          Iterator i = mListeners.iterator();
          Point end = me.getPoint();
          while (i.hasNext()) {
               ((OutlineListener)i.next()).mouseDragEnded(mStart, end);
          //mStart = null;
     public void mouseMoved(MouseEvent me) {
          if (mUseMove) {
               doMouseDragged(me);
     public     void addOutlineListener(OutlineListener ol) {
          mListeners.add(ol);
     public void removeOutlineListener(OutlineListener ol) {
          mListeners.remove(ol);
     private class MyRunnable implements Runnable {
          public void run() {
               Graphics g = mComponent.getGraphics();
               if (g == null) {
                    return;
               Graphics2D g2 = (Graphics2D) g;
               Stroke s = g2.getStroke();
               g2.setStroke(DASH_STROKE);
               int x = Math.min(mStart.x, mEnd.x);
               int y = Math.min(mStart.y, mEnd.y);
               int w = Math.abs(mEnd.x - mStart.x);
               int h = Math.abs(mEnd.y - mStart.y);
               g2.setXORMode(Color.WHITE);
               g2.drawRect(x, y, w, h);
               g2.setStroke(s);
     public void doMouseDragged(MouseEvent me) {
          mEnd = me.getPoint();
          if (mStart != null) {
               mComponent = me.getComponent();
               mComponent.repaint();
               SwingUtilities.invokeLater(mRunner);
     public static MouseDragOutliner addAMouseDragOutliner(Component c) {
          MouseDragOutliner mdo = new MouseDragOutliner();
          c.addMouseListener(mdo);
          c.addMouseMotionListener(mdo);
          return mdo;
     public static interface OutlineListener {
          public void mouseDragEnded(Point start, Point finish);
     public static void main(String[] args) {
          JFrame f = new JFrame("MouseDragOutliner Test");
          Container c = f.getContentPane();
          JPanel p = new JPanel();
          //p.setBackground(Color.BLACK);
          c.add(p);
          addAMouseDragOutliner(p);
          f.setBounds(200, 200, 400, 400);
          f.addWindowListener(new WindowClosingActions.Exit());
          f.setVisible(true);
}

Can someone help with a previous post labeled "Writing to a data file with time stamp - Help! "

Can someone possibly help with a previous post labeled "Writing to a data file with time stamp - Help! "
Thanks

whats the problem?
Aquaphire
---USING LABVIEW 6.1---

Help with basic program

The program I am writing is supposed to ask the user to input a 4-digit Integer whose digits are not all the same, and then place the number in descending and ascending order, then subtract until the number 6174 is met.
I'm very new with java but I can't seem to get my if statement to loop back until the condition I want is met.
I know that a while statement will loop back, but when I tried that it just kept looping over and over again.
Any help and tips for later on in my project will be great.
import java.util.Scanner;
public class program2
    public static void main(String[] args)
      int      Number, D1, D2, D3, D4, Temp;
      Scanner Keyboard = new Scanner(System.in);
      boolean NoNumberYet;
      System.out.println("Please enter a 4-digit positive integer whose digits are all different: ");
      Number = Keyboard.nextInt();
      D1 = (Number/1000);
      D2 = (Number/100) %10;
      D3 = (Number/10) %10;
      D4 = Number %10;
      NoNumberYet = true;
      while(NoNumberYet)
        if (D1 == D2 && D2 == D3 && D3 == D4)
           NoNumberYet = false;
           System.out.println("The number you entered contains the same digits.");
           System.out.print("Please re-enter the number: ");
           Number = Keyboard.nextInt();
    }

On to a new question.
I need to subtract the rearranged descending number by the ascending arranged number.
I need to know how to place my rearranged digits in place of the original number and then subtract it.
Heres what I have so far:
import java.util.Scanner;
public class program2
    public static void main(String[] args)
      int      Number, d1, d2, d3, d4, temp;
      Scanner Keyboard = new Scanner(System.in);
      System.out.println("Please enter a 4-digit positive integer whose digits are all different: ");
      Number = Keyboard.nextInt();
      d1 = (Number/1000);
      d2 = (Number/100) %10;
      d3 = (Number/10) %10;
      d4 = Number %10;
      if (d1 == d2 && d2 == d3 && d3 == d4)
           System.out.println("The number you entered contains the same digits.");
           System.out.print("Please re-enter the number: ");
           Number = Keyboard.nextInt();
      if (d1 < d2)
         temp = d1;
         d1   = d2;
         d2   = temp;
      if (d2 < d3)
         temp = d2;
         d2   = d3;
         d3   = temp;
      if (d3 < d4)
         temp = d3;
         d3   = d4;
         d4   = temp;
      if (d1 < d2)
         temp = d1;
         d1   = d2;
         d2   = temp;
      if (d2 < d3)
         temp = d2;
         d2   = d3;
         d3   = temp;
      if (d1 < d2)
         temp = d1;
         d1   = d2;
         d2   = temp;
}Any help would be appreciated, also the output needs to appear on screen.
My guess is that I need to somehow drop d1, d2 ,d3, and d4 into a new variable, and then subtract from the reverse. I dont know how to drop the digits into a new number, or the original entered number.
Thanks.
Message was edited by:
Bmiller234

Need some help with a program Please.

Well, im new here, im new to java, so i need your help, i have to make a connect four program, my brother "Kind of" helped me and did a program for me, but the problem is i cant use some of those commands in the program and i have to replace them with what ive learned, so i will post the program and i will need your help to modify it for me.
and for these programs, also i want help for:
They have errors and i cant fix'em
the commands that i've leaned:
If statements, for loops, while loops,do while, strings, math classes, swithc statement, else if,logical operators,methods, one and two dimensional arrays.
Thanx in advance,
truegunner
// Fhourstones 3.0 Board Logic
// Copyright 2000-2004 John Tromp
import java.io.*;
class Connect4 {
static long color[]; // black and white bitboard
static final int WIDTH = 7;
static final int HEIGHT = 6;
// bitmask corresponds to board as follows in 7x6 case:
// . . . . . . . TOP
// 5 12 19 26 33 40 47
// 4 11 18 25 32 39 46
// 3 10 17 24 31 38 45
// 2 9 16 23 30 37 44
// 1 8 15 22 29 36 43
// 0 7 14 21 28 35 42 BOTTOM
static final int H1 = HEIGHT+1;
static final int H2 = HEIGHT+2;
static final int SIZE = HEIGHT*WIDTH;
static final int SIZE1 = H1*WIDTH;
static final long ALL1 = (1L<<SIZE1)-1L; // assumes SIZE1 < 63
static final int COL1 = (1<<H1)-1;
static final long BOTTOM = ALL1 / COL1; // has bits i*H1 set
static final long TOP = BOTTOM << HEIGHT;
int moves[],nplies;
byte height[]; // holds bit index of lowest free square
public Connect4()
color = new long[2];
height = new byte[WIDTH];
moves = new int[SIZE];
reset();
void reset()
nplies = 0;
color[0] = color[1] = 0L;
for (int i=0; i<WIDTH; i++)
height[i] = (byte)(H1*i);
public long positioncode()
return 2*color[0] + color[1] + BOTTOM;
// color[0] + color[1] + BOTTOM forms bitmap of heights
// so that positioncode() is a complete board encoding
public String toString()
StringBuffer buf = new StringBuffer();
for (int i=0; i<nplies; i++)
buf.append(1+moves);
buf.append("\n");
for (int w=0; w<WIDTH; w++)
buf.append(" "+(w+1));
buf.append("\n");
for (int h=HEIGHT-1; h>=0; h--) {
for (int w=h; w<SIZE1; w+=H1) {
long mask = 1L<<w;
buf.append((color[0]&mask)!= 0 ? " @" :
(color[1]&mask)!= 0 ? " 0" : " .");
buf.append("\n");
if (haswon(color[0]))
buf.append("@ won\n");
if (haswon(color[1]))
buf.append("O won\n");
return buf.toString();
// return whether columns col has room
final boolean isplayable(int col)
return islegal(color[nplies&1] | (1L << height[col]));
// return whether newboard lacks overflowing column
final boolean islegal(long newboard)
return (newboard & TOP) == 0;
// return whether newboard is legal and includes a win
final boolean islegalhaswon(long newboard)
return islegal(newboard) && haswon(newboard);
// return whether newboard includes a win
final boolean haswon(long newboard)
long y = newboard & (newboard>>HEIGHT);
if ((y & (y >> 2*HEIGHT)) != 0) // check diagonal \
return true;
y = newboard & (newboard>>H1);
if ((y & (y >> 2*H1)) != 0) // check horizontal -
return true;
y = newboard & (newboard>>H2); // check diagonal /
if ((y & (y >> 2*H2)) != 0)
return true;
y = newboard & (newboard>>1); // check vertical |
return (y & (y >> 2)) != 0;
void backmove()
int n;
n = moves[--nplies];
color[nplies&1] ^= 1L<<--height[n];
void makemove(int n)
color[nplies&1] ^= 1L<<height[n]++;
moves[nplies++] = n;
public static void main(String argv[])
Connect4 c4;
String line;
int col=0, i, result;
long nodes, msecs;
c4 = new Connect4();
c4.reset();
BufferedReader dis = new BufferedReader(new InputStreamReader(System.in));
for (;;) {
System.out.println("position " + c4.positioncode() + " after moves " + c4 + "enter move(s):");
try {
line = dis.readLine();
} catch (IOException e) {
System.out.println(e);
System.exit(0);
return;
if (line == null)
break;
for (i=0; i < line.length(); i++) {
col = line.charAt(i) - '1';
if (col >= 0 && col < WIDTH && c4.isplayable(col))
c4.makemove(col);
By the way im using Ready to program for the programming.

You can't really believe that his brother did this
for him...I did miss that copyright line at the beginning when
I first looked it over, but you know, if it had been
his brother, I'd be kinda impressed. This wasn't a
25 line program. It actually would have required
SOME thought. I doubt my brother woulda done that
for me (notwithstanding the fact that I wouldn't need
help for that program, and my brother isn't a
programmer).I originally missed the comments at the top but when I saw the complexity of what was written then I knew that it was too advanced for a beginner and I relooked through the code and saw the comments.

Help with Payroll program

Hello I need help with the following code for a Payroll program.
//CheckPoint: Payroll Program Part 3
//Java Programming IT215
//Arianne Gallegos
//05/02/2007
//Payroll3.java
//Payroll program that calculates the weekly pay for an employee.
import java.util.Scanner; // program uses class Scanner
public class Payroll3
     private string name;
     private double rate;
     private double hours;
     // Constructor to store Employee Data
     public EmployeeData( String nameOfEmployee, double hourlyRate, double hoursWorked )
          name = nameOfEmployee;
          rate = hourlyRate;
          hours = hoursWorked;
     } // end constructor
} //end class EmployeeData
   // main method begins execution of java application
   public static void main( String args[] )
      System.out.println( "Welcome to the Payroll Program! " );
      boolean quit = false; // This flag will control whether we exit the loop below
      // Loop until user types "quit" as the employee name:
      while (!quit)
       // create scanner to obtain input from command window
        Scanner input = new Scanner ( System.in );
        System.out.println(); // outputs a blank line
        System.out.print( "Please enter the employee name or quit to terminate program: " );
        // prompt for and input employee name
        String nameOfEmployee = input.nextLine(); // read what user has inputted
        if ( nameOfEmployee.equals("quit")) // Check whether user indicated to quit program
          System.out.println( "Program has ended" );
          quit = true;
else
          // User did not indicate to stop, so continue reading info for this iteration:
          float hourlyRate; // first number to multiply
          float hoursWorked; // second number to multiply
          float product; // product of hourlyRate and hoursWorked
          System.out.print( "Enter hourly rate: " ); // prompt
          hourlyRate = input.nextFloat(); // read first number from user
          while (hourlyRate <= 0) // prompt until a positive value is entered
             System.out.print( "Hourly rate must be a positive value. " +
               "Please enter the hourly rate again: " ); // prompt for positive value for hourly rate
              hourlyRate = input.nextFloat(); // read first number again
          System.out.print( "Enter hours worked: " ); // prompt
          hoursWorked = input.nextFloat(); // read second number from user
          while (hoursWorked <= 0) // prompt until a positive value is entered
             System.out.print( "Hours worked must be a positive value. " +
               "Please enter the hours worked again: " ); // prompt for positive value for hours worked
              hoursWorked = input.nextFloat(); // read second number again
          product = (float) hourlyRate * hoursWorked; // multiply the hourly rate by the hours worked
          // Display output for this iteration
          System.out.println(); // outputs a blank line
          System.out.print( nameOfEmployee ); // display employee name
          System.out.printf( "'s weekly pay is: $%,.2f\n", product); // display product
          System.out.println(); // outputs a blank line
      // Display ending message:
      System.out.println( "Thank you for using the Payroll program!" );
      System.out.println(); // outputs a blank line
   } // end method main
} // end class Payroll3I am getting the following errors:
Payroll3.java:18: invalid method declaration; return type required
public EmployeeData( String nameOfEmployee, double hourlyRate, double hours
Worked )
^
Payroll3.java:28: class, interface, or enum expected
public static void main( String args[] )
^
Payroll3.java:33: class, interface, or enum expected
boolean quit = false; // This flag will control whether we exit the loop b
elow
^
Payroll3.java:36: class, interface, or enum expected
while (!quit)
^
Payroll3.java:42: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:43: class, interface, or enum expected
System.out.print( "Please enter the employee name or quit to terminate p
rogram: " );
^
Payroll3.java:45: class, interface, or enum expected
String nameOfEmployee = input.nextLine(); // read what user has inputted
^
Payroll3.java:48: class, interface, or enum expected
if ( nameOfEmployee.equals("quit")) // Check whether user indicated to q
uit program
^
Payroll3.java:51: class, interface, or enum expected
quit = true;
^
Payroll3.java:52: class, interface, or enum expected
^
Payroll3.java:57: class, interface, or enum expected
float hoursWorked; // second number to multiply
^
Payroll3.java:58: class, interface, or enum expected
float product; // product of hourlyRate and hoursWorked
^
Payroll3.java:60: class, interface, or enum expected
System.out.print( "Enter hourly rate: " ); // prompt
^
Payroll3.java:61: class, interface, or enum expected
hourlyRate = input.nextFloat(); // read first number from user
^
Payroll3.java:64: class, interface, or enum expected
while (hourlyRate <= 0) // prompt until a positive value is entered
^
Payroll3.java:68: class, interface, or enum expected
hourlyRate = input.nextFloat(); // read first number again
^
Payroll3.java:69: class, interface, or enum expected
^
Payroll3.java:72: class, interface, or enum expected
hoursWorked = input.nextFloat(); // read second number from user
^
Payroll3.java:75: class, interface, or enum expected
while (hoursWorked <= 0) // prompt until a positive value is entered
^
Payroll3.java:79: class, interface, or enum expected
hoursWorked = input.nextFloat(); // read second number again
^
Payroll3.java:80: class, interface, or enum expected
^
Payroll3.java:86: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:87: class, interface, or enum expected
System.out.print( nameOfEmployee ); // display employee name
^
Payroll3.java:88: class, interface, or enum expected
System.out.printf( "'s weekly pay is: $%,.2f\n", product); // display
product
^
Payroll3.java:89: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:91: class, interface, or enum expected
^
Payroll3.java:96: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:98: class, interface, or enum expected
} // end method main
^
The problem I am having is getting the constructor to work with the rest of the program can someone please point out to me how to correct this. I have read my textbook as well as tutorials but I just don't seem to get it right. Please help.
P.S. I have never taken a programming class before so please be kind.

Ok, I changed the name of the constructor:
//CheckPoint: Payroll Program Part 3
//Java Programming IT215
//Arianne Gallegos
//04/23/2007
//Payroll3.java
//Payroll program that calculates the weekly pay for an employee.
import java.util.Scanner; // program uses class Scanner
public class Payroll3
     private string name;
     private float rate;
     private float hours;
     // Constructor to store Employee Data
     public void Payroll3( string nameOfEmployee, float hourlyRate, float hoursWorked )
          name = nameOfEmployee;
          rate = hourlyRate;
          hours = hoursWorked;
     } // end constructor
} //end class EmployeeData
   // main method begins execution of java application
   public static void main( String args[] )
      System.out.println( "Welcome to the Payroll Program! " );
      boolean quit = false; // This flag will control whether we exit the loop below
      // Loop until user types "quit" as the employee name:
      while (!quit)
       // create scanner to obtain input from command window
        Scanner input = new Scanner ( System.in );
        System.out.println(); // outputs a blank line
        System.out.print( "Please enter the employee name or quit to terminate program: " );
        // prompt for and input employee name
        String nameOfEmployee = input.nextLine(); // read what user has inputted
        if ( nameOfEmployee.equals("quit")) // Check whether user indicated to quit program
          System.out.println( "Program has ended" );
          quit = true;
else
          // User did not indicate to stop, so continue reading info for this iteration:
          float hourlyRate; // first number to multiply
          float hoursWorked; // second number to multiply
          float product; // product of hourlyRate and hoursWorked
          System.out.print( "Enter hourly rate: " ); // prompt
          hourlyRate = input.nextFloat(); // read first number from user
          while (hourlyRate <= 0) // prompt until a positive value is entered
             System.out.print( "Hourly rate must be a positive value. " +
               "Please enter the hourly rate again: " ); // prompt for positive value for hourly rate
              hourlyRate = input.nextFloat(); // read first number again
          System.out.print( "Enter hours worked: " ); // prompt
          hoursWorked = input.nextFloat(); // read second number from user
          while (hoursWorked <= 0) // prompt until a positive value is entered
             System.out.print( "Hours worked must be a positive value. " +
               "Please enter the hours worked again: " ); // prompt for positive value for hours worked
              hoursWorked = input.nextFloat(); // read second number again
          product = (float) hourlyRate * hoursWorked; // multiply the hourly rate by the hours worked
          // Display output for this iteration
          System.out.println(); // outputs a blank line
          System.out.print( nameOfEmployee ); // display employee name
          System.out.printf( "'s weekly pay is: $%,.2f\n", product); // display product
          System.out.println(); // outputs a blank line
      // Display ending message:
      System.out.println( "Thank you for using the Payroll program!" );
      System.out.println(); // outputs a blank line
   } // end method main
} // end class Payroll3I still get the following error codes:
C:\IT215\Payroll3>javac Payroll3.java
Payroll3.java:28: class, interface, or enum expected
public static void main( String args[] )
^
Payroll3.java:33: class, interface, or enum expected
boolean quit = false; // This flag will control whether we exit the loop b
elow
^
Payroll3.java:36: class, interface, or enum expected
while (!quit)
^
Payroll3.java:42: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:43: class, interface, or enum expected
System.out.print( "Please enter the employee name or quit to terminate p
rogram: " );
^
Payroll3.java:45: class, interface, or enum expected
String nameOfEmployee = input.nextLine(); // read what user has inputted
^
Payroll3.java:48: class, interface, or enum expected
if ( nameOfEmployee.equals("quit")) // Check whether user indicated to q
uit program
^
Payroll3.java:51: class, interface, or enum expected
quit = true;
^
Payroll3.java:52: class, interface, or enum expected
^
Payroll3.java:57: class, interface, or enum expected
float hoursWorked; // second number to multiply
^
Payroll3.java:58: class, interface, or enum expected
float product; // product of hourlyRate and hoursWorked
^
Payroll3.java:60: class, interface, or enum expected
System.out.print( "Enter hourly rate: " ); // prompt
^
Payroll3.java:61: class, interface, or enum expected
hourlyRate = input.nextFloat(); // read first number from user
^
Payroll3.java:64: class, interface, or enum expected
while (hourlyRate <= 0) // prompt until a positive value is entered
^
Payroll3.java:68: class, interface, or enum expected
hourlyRate = input.nextFloat(); // read first number again
^
Payroll3.java:69: class, interface, or enum expected
^
Payroll3.java:72: class, interface, or enum expected
hoursWorked = input.nextFloat(); // read second number from user
^
Payroll3.java:75: class, interface, or enum expected
while (hoursWorked <= 0) // prompt until a positive value is entered
^
Payroll3.java:79: class, interface, or enum expected
hoursWorked = input.nextFloat(); // read second number again
^
Payroll3.java:80: class, interface, or enum expected
^
Payroll3.java:86: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:87: class, interface, or enum expected
System.out.print( nameOfEmployee ); // display employee name
^
Payroll3.java:88: class, interface, or enum expected
System.out.printf( "'s weekly pay is: $%,.2f\n", product); // display
product
^
Payroll3.java:89: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:91: class, interface, or enum expected
^
Payroll3.java:96: class, interface, or enum expected
System.out.println(); // outputs a blank line
^
Payroll3.java:98: class, interface, or enum expected
} // end method main
^
27 errors
Any other suggestions?

Help with Tree Program

I'm having some problems with my program. It's a binary tree of names but they aren't organized in any particular order and names can repeat. I built the tree correctly but the problem comes in writing a method. I have to write method pathLength with parameters (Treenode, Person (object), and level (starts as 1) ) it returns the longest path from the TreeNode to the node containing the Person. My code seems to work for most of the names on the tree except for one or two and I can't see why. Here's my code:
public int pathLength(TreeNode t, String name, int level)
     if(t==null)
     return 0;
else if((name.equals(t.getValue())&&(t.getLeft()==null||t.getRight()==null)))
     return level;
     return max(pathLength(t.getLeft(),name,level+1),pathLength(t.getRight(),name,level+1));
max is a method that returns the larger of two integers (x,y)
next I have to write method rootPath with parameter (TreeNode) that returns the longest path from the root of the tree to a node containing the same as root.........this method I'm not even close on but I would have thought that all I needed to do for code was
     public int rootPath(TreeNode t)
          return pathLength(t,(String)t.getValue(),1);
so that it would go from t to another node with t's value.........maybe its because pathLength doesn't work

and also another part of my program that i'm having trouble with is a different tree which has letters as leaves and null's as parents etc. To get to a letter u follow a code of 1's and 0's so 1110 would be left left left right and u'd get a letter.....i wrote the code that i'll get a code and i can find the letter but now i hafta make it go opposite so i type a letter and it gives the code
they provided me with the main code
public String wordToBits(String word)
String result="";
for(int k=0; k<word.length(); k++)
result+=wordToBitsHelper(word.substring(k,k+1),myRoot,"""");
return result;
i hafta write method private String wordToBitsHelper(String s, Treenode t, String pathSoFar)
and im really lost

Help with Recurrsion program

I seem to be having a little problem with my program. In my main program, depending on which method comes first, the other methods wont work for example the way my main program is not, with occurance method before removeLetter method, the occurance method works fine, but my removeLetter meth won't remove the letter. But if i switch the two and have removeLetter first then it will remove the letter, but my occurance method will come back say the letter is not in the word even when it is...can someone help me? Thanx in advance...
class CharacterRecurrance{
     private int i=0;
     private int occur=0;
     void inString(String s, char n){
          if(i<s.length()){
               if(s.charAt(i)==n)
                    System.out.println("Yes, the letter" + " " + n + " " + "is present");
               else{
                    i++;
                    inString(s,n);
          else System.out.println("No, the letter" + " " + n + " " + "is not present");
     void occurance(String s, char n){
          if(i < s.length()){
               if(s.charAt(i)==n){
                    occur++;
                    i++;
                    occurance(s,n);
               else{
                    i++;
                    occurance(s,n);
          else System.out.println("The letter" + " " + n + " " + "appears" + " " + occur + " " + "times");
     void removeLetter(String s, char n){
          if(i < s.length()){
               if(s.charAt(i)==n){
                    s = s.replace(s.charAt(i),' ');
                    i++;
                    removeLetter(s,n);
               else{
                    i++;
                    removeLetter(s,n);
          else System.out.println(s);
class Program3_10{
     public static void main(String[] a) {
          CharacterRecurrance find = new CharacterRecurrance();
          String word = "mississippi";
          char letter = 's';
          find.inString(word, letter);
          System.out.println();
          find.occurance(word, letter);
          System.out.println();
          find.removeLetter(word, letter);
}

Or make it zero in the last step of each function. Like this-void occurance(String s, char n){
          if(i < s.length()){
               if(s.charAt(i)==n){
                    occur++;
                    i++;
                    occurance(s,n);
               else{
                    i++;
                    occurance(s,n);
          else{
               System.out.println("The letter" + " " + n + " " + "appears" + " " + occur + " " + "times");
               i=0; // reset to zero.
     }

Help with pathfinding program

hi,
i study java at school and i need help with my project.
im doing a simple demonstration of a pathfinding program whose algoritm i read off Wikipedia (http://en.wikipedia.org/wiki/Pathfinding)where the co-ordinates of the start and end points
are entered and the route is calculated as a list of co-ordinates. Here is the section of code i am having trouble with-
void find_path(int x,int y,int p,int q)
int t1;int t2;
int temp_pool[][]=new int[4][3];//stores contagious cells of elements in grid pool
int grid_pool[][]= new int[100000][3];
int pass_pool[][]=new int[4][3];//stores the pool of squares which can be added to the list of direction
int path[][]= new int[10000][3];//stores actual path
int count=1;int note=10;int kk=0;
int curx,cury;
//the above arrays contain 3 columns - to store x and y co-ordinate and a counter variable(the purpose of which will become clear later)
grid_pool[0][0]=p;
grid_pool[0][1]=q;
grid_pool[0][2]=0;
int counter=grid_pool[0][2];
for(int i=0;i<=100;i++)
counter++;
curx=grid_pool[0];
cury=grid_pool[i][1];
temp_pool[0][0]=curx-1;
temp_pool[0][1]=cury;
temp_pool[0][2]=counter;
temp_pool[0][0]=curx;
temp_pool[0][1]=cury-1;
temp_pool[0][2]=counter;
temp_pool[0][0]=curx+1;
temp_pool[0][1]=cury;
temp_pool[0][2]=counter;
temp_pool[0][0]=curx;
temp_pool[0][1]=cury+1;
temp_pool[0][2]=counter;
int pass=0;
for(int j=0;j<=3;j++)
int check=0;
int in=temp_pool[j][0];
int to=temp_pool[j][1];
if(activemap[in][to]=='X')
{check++;}
if(linear_search(grid_pool,in,to)==false)
{check++;}
if(check==2)
pass_pool[pass][0]=in;
pass_pool[pass][1]=to;
pass++;
}//finding which co-ordinates are not walls and which are not already present
for(int k=0;k<=pass_pool.length-1;k++)
grid_pool[count][0]=pass_pool[k][0];
grid_pool[count][1]=pass_pool[k][1];
count++;
if(linear_search(grid_pool,x,y)==true)
break;
//in this part we have isolated the squares which run in the approximate direction of the goal
//in the next part we will isolate the exact co-ordinates in another array called path
int yalt=linear_searchwindex(grid_pool,p,q);
t1=grid_pool[yalt][2];
int g1;int g2;int g3;
for(int u=yalt;u>=0;u--)
g3=find_next(grid_pool,p,q);
g2=g3/10;
g1=g3%10;
path[0]=g2;
path[u][1]=g3;
path[u][2]=u;
for(int v=0;v<=yalt;v++)
System.out.println(path[v][0]+','+path[v][1]);
ill be grateful if anyone can fix it. im done with the rest though

death_star12 wrote:
hi,
i study java at school and i need help with my project.
im doing a simple demonstration of a pathfinding program whose algoritm i read off Wikipedia (http://en.wikipedia.org/wiki/Pathfinding)where the co-ordinates of the start and end points
are entered and the route is calculated as a list of co-ordinates. Here is the section of code i am having trouble with-
...The part "i am having trouble with" means absolutely nothing to the people who are answering questions here. It's like going to the doctor with a broken rib and just saying "doc, I don't feel so well". Get my point?
Also, please take the trouble to properly spell words and use a bit of capitalization. Your question is hard to read as it is, which will most probably cause (some) people not to help you. And lastly, please use code tags when posting code: it makes it so much easier to read (see: [Formatting Messages|http://mediacast.sun.com/users/humanlever/media/forums_text_editor.mp4]).
Thanks.

Help with Dice program.

Hi People!
This is the homework my professor assigned for me.
Assignment 2: Write a program that rolls two dice 1000 times, counting the number of box cars (two sixes) that occur, in object-oriented way. (In other words, do not make all your code in one main() method. Use classes and objects.) Use a overloaded constructors.
I have to use two classes for it. One of is the Dice(Below), and the other would be the client
This is what I have for the dice part so far.
public class DiceServer {
public static void main (String[] args)
final int ROLLS = 1000;
int Boxcars = 0, num1, num2;
Die die1 = new Die();
Die die2 = new Die();
for (int roll = 1; roll <= ROLLS; roll++)
num1 = die1.roll();
num2 = die2.roll();
if (num1 == 6 && num2== 6)
Boxcars++;
System.out.println("Number of rolls: " + ROLLS);
System.out.println("Number of Box Cars: " + Boxcars);
I'm getting an error about the symbol not being resolved, and it's pointing at "Die die1 = new Die();". Can someone please help me. Thank you.
Also, can someone plaese get me started on the Client Class. Thanks

Hi,
I've gotten pretty far with this program thanks to all your help but I've got another question.
My program so far has been able to display the result of rolling 2 six sided dice 1000 times. I've used Boxcars.java as my Client and Die.java as my overloaded constructor. Now I want to display the number of Boxcars(Double six)by rolling a six-sided die and a 20 sided die together.
My question is would I code that in Boxcars.java or Die.java.
Thank you!!!
Boxcars.java
public class BoxCars {
public static void main (String[] args)
final int ROLLS = 1000;
int Boxcars = 0, num1, num2;
Die die1 = new Die();
Die die2 = new Die();
for (int roll = 1; roll <= ROLLS; roll++)
num1 = die1.roll();
num2 = die2.roll();
if (num1 == 6 && num2== 6)
Boxcars++;
System.out.println("Number of rolls: " + ROLLS);
System.out.println("Number of Box Cars: " + Boxcars);
Die.java
public class Die {
private final int MIN_FACES = 4;
private int numFaces;
private int faceValue;
public Die ()
numFaces = 6;
faceValue = 1;
public Die (int faces)
if (faces < MIN_FACES)
numFaces = 6;
else
numFaces = faces;
faceValue = 1;
public int roll ()
faceValue = (int) (Math.random() * numFaces) + 1;
return faceValue;
public int getFaceValue()
return faceValue;
************************************************************

Need help with basic program.....!

I've to write a program that generates a random number, which the user has to try and guess, after each guess they're told whether it's too high or too low etc., I've gotten this far, however, the user has only 10 guesses.... In my program I've used a while loop and the user gets an infinite number of guesses, I know I'm supposed to use a for loop, but can't seem to get it to work properly. Also, when the user guesses the number, the program then has to print out how many guesses it took, and I have no idea how to get it to do this AT ALL!!! I'd really appreciate some help with this, thanks v. much!!!!

I've to write a program that generates a random
number, which the user has to try and guess, after
each guess they're told whether it's too high or too
low etc., I've gotten this far, however, the user has
only 10 guesses.... In my program I've used a while
loop and the user gets an infinite number of guesses,
I know I'm supposed to use a for loop, but can't seem
to get it to work properly. Also, when the user
guesses the number, the program then has to print out
how many guesses it took, and I have no idea how to
get it to do this AT ALL!!! I'd really appreciate some
help with this, thanks v. much!!!!Hey not every book covers every aspect of Java (if you haven't got a book and don't want to buy 1 i recommend an online tutorial) If u want the user to have an infinate number of guesses, use an infinate while loop. Put this in a file called app.java:
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class app extends Applet implements ActionListener
     JLabel lbl=new JLabel("Guess a number between 0 and 10:");
     JTextField txtfield=new JTextField(20);
     JButton button=new JButton("Guess...");
     JLabel lbl2=new JLabel();
     int randomnumber=Math.round((float)Math.random()*10);
     public void init()
          add(lbl);
          add(txtfield);
          add(button);
          button.addActionListener(this);
     public void actionPerformed (ActionEvent e)
          String s=new String("");
          s+=randomnumber;
          if (e.getSource().equals(button) && txtfield.getText().equals(s))
               setBackground(Color.white);
               setForeground(Color.black);
               lbl2.setText("Got it!");
               add(lbl2);
               validate();
          else
               setBackground(Color.white);
               setForeground(Color.black);
               if (Integer.parseInt(txtfield.getText())>randomnumber)
               lbl2.setText("Too High!");
               else
               lbl2.setText("Too Low!");
               add(lbl2);
               validate();
Then create a HTML document in the classes folder:
<HTML>
<HEAD>
<TITLE>APPLET</TITLE>
</HEAD>
<BODY>
<HR>
<CENTER>
<APPLET
     CODE=app.class
     WIDTH=400
     HEIGHT=200 >
</APPLET>
</CENTER>
<HR>
</BODY>
</HTML>
It will do what you wish. If you want to have more then 10 numbers to guess, for example 100, do this:
int randomnumber=Math.round((float)Math.random()*100);
Does that answer your question?

Little Help with my program..

Ok... I am not completely finished with the program but I need to figure out something before I move on. This program is reading in information from a file. The thing I am having a problem with is how I can get it to add the GPA for each group of people, instead of adding the GPA for everyone in the file!! This program is basically reading in, the "groups living group", the name of each student, and their GPA. If you run my program, you will see a printout of "GPA sum in group" and GPA sum overall, I figured out how to get the sum overall for all the groups, but I cant figure out how to get the sum for each individual group! I hope this makes sense!!! If you need more clarification just ask!!! Thanks in advance! Also, I have compiled the program already and it runs just fine..!
I will give you the information from the file being read in. Here it is
Kappa Alpha Tau Sorority
Hollander 3.347
LaFarge 1.110
EndOfGroup
Taylor 2C Dormitory Section
Rapoport 2.2956
Smith 3.87
Scarl 3.48
Granville 2.946
EndOfGroup
Richards 4B Dormitory Section
Horstmann 2.769
Cole 3.47
Barney 2.23
EndOfGroup
Here is my code!!!!
import java.util.Scanner;
import java.text.DecimalFormat;
public class GPA
public static void main(String[] args)
final String SENTINEL = "EndOfGroup";
final double MAX_GPA = 4.0;
final Double MIN_GPA = 0.0;
final boolean DEBUG = true;
String livingG, studentName, stuName, wrongFormat;
double gpa = 0.0, gpaSum = 0.0, dVal = 0.0, maxGpa = 0.0,
avgGpa = 0.0, minGpa = 0.0, overMax = 0.0, overMin = 0.0,
dMin = 0.0, dMax = 0.0;
int counter = 0, grpNum = 0, totNum = 0;
DecimalFormat form = new DecimalFormat("0.00%");
Scanner scan = new Scanner(System.in);
while(scan.hasNext())
livingG = scan.nextLine();
System.out.println("Living Group: " + livingG);
stuName = scan.next();
grpNum = 0;
while(!stuName.equals(SENTINEL))
if(!scan.hasNextDouble())
wrongFormat = scan.next();
System.out.println("ERROR: USER INPUT NOT IN PROPER " +
"FORMAT " + wrongFormat);
else
gpa = scan.nextDouble();
System.out.println(" Student: " + stuName + " GPA = " +
gpa);
if(DEBUG == true)
grpNum++;
counter++;
gpaSum = gpaSum + gpa;
totNum++;
System.out.println("DEBUG:" + "\n" + " Number in group = " +
grpNum + " GPA sum in group = " + gpa + "\n" + " Total " +
"number = " + totNum + " GPA sum overall = " + gpaSum + "\n" +
" Minimum GPA in group = " + dMin + " Maximum GPA " +
"in group = " + MAX_GPA + "\n" + " Overall minimum GPA = " +
overMin + " Overall maximum GPA = " + overMax);
System.out.println();
stuName = scan.next();
else
stuName = scan.next();
System.out.println("Average GPA for this group = " + gpaSum / counter);
System.out.println("Minimum GPA for this group = " + minGpa);
System.out.println("Maximum GPA for this group = " + maxGpa);
System.out.println();
livingG = scan.nextLine();
}

Oh, Ok I see the code tag thing now!!! I will use now. Any other input to my question?
import java.util.Scanner;
import java.text.DecimalFormat;
public class GPA
   public static void main(String[] args)
      final String SENTINEL = "EndOfGroup";
      final double MAX_GPA = 4.0;
      final Double MIN_GPA = 0.0;
      final boolean DEBUG = true;
      String livingG, studentName, stuName, wrongFormat;
      double gpa = 0.0, gpaSum = 0.0, dVal = 0.0, maxGpa = 0.0,
      avgGpa = 0.0, minGpa = 0.0, overMax = 0.0, overMin = 0.0,
      dMin = 0.0, dMax = 0.0;
      int counter = 0, grpNum = 0, totNum = 0;
      DecimalFormat form = new DecimalFormat("0.00%");
      Scanner scan = new Scanner(System.in);
      while(scan.hasNext())
         livingG = scan.nextLine();
         System.out.println("Living Group: " + livingG);
         stuName = scan.next();
          grpNum = 0;
         while(!stuName.equals(SENTINEL))
            if(!scan.hasNextDouble())
            wrongFormat = scan.next();
            System.out.println("ERROR: USER INPUT NOT IN PROPER " +
            "FORMAT " + wrongFormat);
            else
            gpa = scan.nextDouble();
            System.out.println("   Student: " + stuName + "     GPA = " +
            gpa);
            if(DEBUG == true)
            grpNum++;
            counter++;
            gpaSum = gpaSum + gpa;
            totNum++;
            System.out.println("DEBUG:" + "\n" + "   Number in group = " +
            grpNum + "   GPA sum in group = " + gpa + "\n" + "   Total " +
            "number = " + totNum + "   GPA sum overall = " + gpaSum + "\n" +
             "   Minimum GPA in group = " + dMin + "   Maximum GPA " +
            "in group = " + MAX_GPA + "\n" + "   Overall minimum GPA = " +
            overMin + "   Overall maximum GPA = " + overMax);
            System.out.println();
            stuName = scan.next();
            else
            stuName = scan.next();
      System.out.println("Average GPA for this group = " + gpaSum /    counter);
      System.out.println("Minimum GPA for this group = " + minGpa);
      System.out.println("Maximum GPA for this group = " + maxGpa);
      System.out.println();
      livingG = scan.nextLine();
}

Help with simple programming

Hello everyone.
First time posting, i hope someone would be able to help me out. There are 5 classes that i have to do, but i only need help with one of them. I've been stuck on this one pretty long and can't continue without it.
Instructions:
     Has boolean data member face, either HEADS or TAILS.
     Has a Random data member flipper which is instantiated in the constructor.
     Class constructor has no parameters and randomly chooses the result HEADS or TAILS. (See method flip())
     Method getFace() returns the face showing on the coin.
     void method flip() randomly selects HEADS or TAILS.
package coinflip;
import java.util.Random;
* @author Blank
public class Coin {
    boolean face = false;
    int flip_coin;
    Random flipper = new Random();
    int getFace() {
        return flip_coin;
      Coin() {
        if (flip_coin == 0) {
            face = true;
        } else {
            face = false;
    public void flip() {
        flip_coin = flipper.nextInt(2);
}i really don't know why the random isn't working. I hope someone would be able to find my errors and instruct me on how to fix them. I would be able to continue the rest of the classes as soon as i got this figured out.
Oh and can someone teach me how to import this class into a main one? So i can test it out. This is what i have for it.public class Main {
     * @param args the command line arguments
    public static void main(String[] args) {
     Coin flipCoin = new Coin();
     for(int i=0;i<6;i++){
     System.out.println(flipCoin.getFace());
}Many Thanks!
Edited by: Java_what on Feb 16, 2009 2:26 PM

Constructors are only executed once. What im confused about is:
Class constructor has no parameters and randomly chooses the result HEADS or TAILS. (See method flip())
I thought i would flip() into the constructor. Mind helping me out on the whole class because it seems i am clueless about this whole class.
Edit:
public class Coin {
    boolean face = false;
    int flip_coin;
    Random flipper = new Random();
    int getFace() {
        flip();
        return flip_coin;
    Coin() {
       //flip();
    public void flip() {
        flip_coin = flipper.nextInt(2);
}K i reread what you wrote about the constructor and method. So i placed flip() method in getFace(); because its being called in the main(it gives me random numbers). The problem now is following the directions.
I just dont understand this description. Class constructor has no parameters and randomly chooses the result HEADS or TAILS. (See method flip())
What do you think it means.
Edited by: Java_what on Feb 16, 2009 4:14 PM

Help with Java programming project

Hi,
I need help in writing this Java program. The purpose of this program is to read a variable-length stream of 0, 1 characters from an input text file (call it input.txt) one character at a time, and generate the corresponding B8ZS output stream consisting of the +, - , and 0 characters (with appropriate substitutions) one-character-at-a-time into a text file (called output.txt).
The program must use a class called AMIConverter with an object called AMI . Class AMIConverter must have a method called convert which converts an individual input character 0 or 1 into the appropriate character 0 or + or - of AMI.
It first copy the line to file output.txt. Then read the line one character at a time and pass only valid characters (0 or 1) to AMI.convert, which assumes only valid characters. The first 1 in each new 'Example' should be converted to a +.
This is what is read in, but this is just a test case.
0101<1000
1100a1000b00
1201g101
should now produce two lines of output for each 'Example', as shown below:
This should be the output of the output.txt file
Example 1
in :0101<1000
out:0+0-+000
Example 2
in :1100a1000b00
out:+-00+00000
Example 3
in :1201g101
out:+0-+0-
To elaborate more, only 1 and 0 are passed to "convert" method. All others are ignored. 0 become 0 and 1 become either + or - and the first "1" in each new example should be a +.
This is what I have so far. So far I am not able to get the "in" part, the characters (e.g. : 0101<1000 ) out to the output.txt file. I am only able to get the "out" part. And I also can't get it to display a + for the first "1" in each new examples.
import java.io.*;
public class AMIConverter
     public static void main (String [] args) throws IOException
          AMI ami = new AMI();
          try
               int ch = ' ';
               int lineNum = 1;
     int THE_CHAR_0 = '0';
     int THE_CHAR_1 = '1';
               BufferedReader infile = new BufferedReader(new FileReader("input.txt"));
     PrintWriter outfile = new PrintWriter("output.txt");
     outfile.write("Example " + lineNum);//prints Example 1
     outfile.println();
     outfile.write("in :");
outfile.println();
outfile.write("out:");
     while ((ch = infile.read()) != -1)
     if (ch == '\r' || ch == '\n')
          lineNum++;
          outfile.println();
          outfile.println();
          outfile.write("Example " + lineNum);
          outfile.println();
          outfile.write("in :");
          outfile.println();
          outfile.write("out:");
     else
     if (ch == THE_CHAR_0)
          int output = ami.convert(ch);
          outfile.write(output);
     else
     if (ch == THE_CHAR_1)
          int output = ami.convert(ch);
          outfile.write(output);
}//end while
     infile.close();
     outfile.close();
     }catch (IOException ex) {}
}//main method
}//class AMIConverter
This is my AMI class
import java.io.*;
public class AMI
     int THE_CHAR_0 = '0';
int THE_CHAR_1 = '1';
int total = '+';
int minus = '-';
int count = 0;
public int convert(int ch)
     try
          PrintWriter outfile = new PrintWriter("output.txt");
          if (ch == THE_CHAR_0)
     return ch;
     else
     if (ch == THE_CHAR_1)
     count++;
     if (count%2 == 1)
          ch = total;
          return (ch);
     else
                         ch = minus;
                         return (ch);
}catch (FileNotFoundException e) {}
     return ch;
}//method convert
}//class AMI
Any help would be appreicated.
Thanks!

Hi,
I need help in writing this Java program. The purpose of this program is to read a variable-length stream of 0, 1 characters from an input text file (call it input.txt) one character at a time, and generate the corresponding B8ZS output stream consisting of the +, - , and 0 characters (with appropriate substitutions) one-character-at-a-time into a text file (called output.txt).
The program must use a class called AMIConverter with an object called AMI . Class AMIConverter must have a method called convert which converts an individual input character 0 or 1 into the appropriate character 0 or + or - of AMI.
It first copy the line to file output.txt. Then read the line one character at a time and pass only valid characters (0 or 1) to AMI.convert, which assumes only valid characters. The first 1 in each new 'Example' should be converted to a +.
This is what is read in, but this is just a test case.
0101<1000
1100a1000b00
1201g101
should now produce two lines of output for each 'Example', as shown below:
This should be the output of the output.txt file
Example 1
in :0101<1000
out:0+0-+000
Example 2
in :1100a1000b00
out:+-00+00000
Example 3
in :1201g101
out:+0-+0-
To elaborate more, only 1 and 0 are passed to "convert" method. All others are ignored. 0 become 0 and 1 become either + or - and the first "1" in each new example should be a +.
This is what I have so far. So far I am not able to get the "in" part, the characters (e.g. : 0101<1000 ) out to the output.txt file. I am only able to get the "out" part. And I also can't get it to display a + for the first "1" in each new examples.
import java.io.*;
public class AMIConverter
public static void main (String [] args) throws IOException
AMI ami = new AMI();
try
int ch = ' ';
int lineNum = 1;
int THE_CHAR_0 = '0';
int THE_CHAR_1 = '1';
BufferedReader infile = new BufferedReader(new FileReader("input.txt"));
PrintWriter outfile = new PrintWriter("output.txt");
outfile.write("Example " + lineNum);//prints Example 1
outfile.println();
outfile.write("in :");
outfile.println();
outfile.write("out:");
while ((ch = infile.read()) != -1)
if (ch == '\r' || ch == '\n')
lineNum++;
outfile.println();
outfile.println();
outfile.write("Example " + lineNum);
outfile.println();
outfile.write("in :");
outfile.println();
outfile.write("out:");
else
if (ch == THE_CHAR_0)
int output = ami.convert(ch);
outfile.write(output);
else
if (ch == THE_CHAR_1)
int output = ami.convert(ch);
outfile.write(output);
}//end while
infile.close();
outfile.close();
}catch (IOException ex) {}
}//main method
}//class AMIConverterThis is my AMI class
import java.io.*;
public class AMI
int THE_CHAR_0 = '0';
int THE_CHAR_1 = '1';
int total = '+';
int minus = '-';
int count = 0;
public int convert(int ch)
try
PrintWriter outfile = new PrintWriter("output.txt");
if (ch == THE_CHAR_0)
return ch;
else
if (ch == THE_CHAR_1)
count++;
if (count%2 == 1)
ch = total;
return (ch);
else
ch = minus;
return (ch);
}catch (FileNotFoundException e) {}
return ch;
}//method convert
}//class AMIAny help would be appreicated.
Thanks!

Help with a program i'm writing

Similar Messages

Maybe you are looking for