I need help with a program please
hi, well, i am trying to make a mine searcher (the game where you have to find all the mines within an array of buttons)anyway,i got everything but i am trying to create a method that allows to unable the buttons surrounding a button that was pressed that didn�t have any mines surrounding it (i am sorry if i am being a little confusing, my english is not very good). anyway, i have the following code for that method, but it isn�t working, please if someone can see what the problem is, send me an answer.
(alrededores is a method that returns the number of mines surrounding the position auxiliar[i][j])
public void destapar(boolean [][] auxiliar,int ancho, int largo, int i, int j){
if(alrededores(auxiliar,ancho,largo,i,j)!=0){
casilla[i][j].setLabel(""+alrededores(minados,ancho,largo,aux,j));
casilla[i][j].setEnabled(false);
casilla[i][j].setBackground(new Color(255,255,255));
return;}
else{
casilla[i][j].setLabel("");
casilla[i][j].setEnabled(false);
casilla[i][j].setBackground(new Color(255,255,255));}
if(i>0)
destapar(auxiliar,ancho,largo,i-1,j);
if(i<ancho-1)
destapar(auxiliar,ancho,largo,i+1,j);
if(j>0)
destapar(auxiliar,ancho,largo,i,j-1);
if(j<largo-1)
destapar(auxiliar,ancho,largo,i,j+1);
}
I programmed MineSweeper for my TI-83 back in highschool. You should be able to knock this out of the park.
i would use a one dimensional array and transform the 2d position.
have one one-dim array hold the "mines surrounding value" and one other one-dim array hold the state: "not hit" "hit" "exploded" etc.
I wouldnt dar make the board out of actual buttons. Use a tiled board of .png's or draw the board. Use the mouse location and range and divide by the number of mines to find out where the use clicked.
For example:
Board is from x = 100 to x = 200
Each tile is dx = 10 -> 10 tiles
user hit mouse location x = 105;
(105 - 100) / 10 = tilePosX
for surrounding mines array its just brute force.
fill the mine field at random (thats why the one-dim array helps among other reasons). Then just iterate through adding up mines surrounding it.
Similar Messages
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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. -
I would need help with saving some eamil messages to a disk to unclutter my email. How can I do this please?
Thanks.
ElisabethOpen the email and then from the File menu select Save As Rich Text Format. That'll save it to open in TextEdit. If you want a pdf then open the email and do command-p (Print) and then from the PDF drop down box lower left corner select Save as PDF.
-
Need help with Portal Themes -- Please help
I need help with Portal Themes. I have read every document I can find but I am having no luck. All I want to do is change the colors for the Exceptions on one of my queries. I have created my own Portal Theme where I have changed the colors but I do not know how to assign my newly-created Portal Theme to my query. Can someone please give me the detailed steps on how to do this? Please help because this is driving me crazy.
Thanks.
RyanHi,
Refer
Exceptions - How to change the colors
This may help.
Thanks,
JituK -
I need help with this script please ASAP
So I need this to work properly, but when ran and the correct answer is chosen the app quits but when the wrong answer is chosen the app goes on to the next question. I need help with this ASAP, it is due tommorow. Thank you so much for the help if you can.
The script (Sorry if it's a bit long):
#------------Startup-------------
display dialog "Social Studies Exchange Trviva Game by Justin Parzik" buttons {"Take the Quiz", "Cyaaaa"} default button 1
set Lolz to (button returned of the result)
if Lolz is "Cyaaaa" then
killapp()
else if Lolz is "Take the Quiz" then
do shell script "say -v samantha Ok starting in 3…2…1…GO!"
#------------Question 1-----------
display dialog "Around age 11, many boys left their fathers to become…" buttons {"Scholars", "Warriors", "Apprentices"}
set A1 to (button returned of the result)
if A1 is "Apprentices" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#----------Question 2--------
display dialog "Most children were taught
to read so that they could understand the…" buttons {"Music of Mozart", "Bible", "art of cooking"}
set A2 to (button returned of the result)
if A2 is "Bible" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#------------Question 3---------
display dialog "In the 1730s and 1740s, a religious movement called the_______swept through the colonies." buttons {"Glorius Revolution", "Great Awakening", "The Enlightenment"}
set A3 to (button returned of the result)
if A3 is "Great Awakening" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#-----------Question 4--------
display dialog "_______ was
a famous American Enlightenment figure." buttons {"Ben Franklin", "George Washington", "Jesus"}
set A4 to (button returned of the result)
if A4 is "Ben Franklin" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#----------Question 5-------
display dialog "______ ownership gave colonists political rights as well as prosperity." buttons {"Land", "Dog", "Slave"}
set A5 to (button returned of the result)
if A5 is "Land" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#---------Question 6--------
display dialog "The first step toward guaranteeing these rights came in 1215. That
year, a group of English noblemen forced King John to accept the…" buttons {"Declaration of Independence", "Magna Carta", "Constitution"}
set A6 to (button returned of the result)
if A6 is "Magna Carta" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#----------Question 7--------
display dialog "England's cheif lawmaking body was" buttons {"the Senate", "Parliament", "King George"}
set A7 to (button returned of the result)
if A7 is "Parliament" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#--------Question 8-----
display dialog "Pariliament decided to overthrow _______ for not respecting their rights" buttons {"King James II", "King George", "King Elizabeth"}
set A8 to (button returned of the result)
if A8 is "King James II" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#--------Question 9------
display dialog "Parliament named ___ and ___ as England's new monarchs in something called ____." buttons {"William/Mary/Glorius Revolution", "Adam/Eve/Great Awakening", "Johhny/Mr.Laphalm/Burning of the hand ceremony"}
set A9 to (button returned of the result)
if A9 is "William/Mary/Glorius Revolution" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#---------Question 10-----
display dialog "After accepting the throne William and Mary agreed in 1689 to uphold the English Bill of _____." buttons {"Money", "Colonies", "Rights"}
set A10 to (button returned of the result)
if A10 is "Rights" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#---------Question 11------
display dialog "By the late 1600s French explorers had claimed the ___ River Valey" buttons {"Mississippi", "Ohio", "Hudson"}
set A11 to (button returned of the result)
if A11 is "Ohio" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#------Question 12---------
display dialog "______ was sent to ask the French to leave 'English Land'." buttons {"Johhny Tremain", "George Washington", "Paul Revere"}
set A12 to (button returned of the result)
if A12 is "George Washington" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#---------Question 13-------
display dialog "_____ proposed the Albany Plan of Union" buttons {"George Washingon", "Ben Franklin", "John Hancock"}
set A13 to (button returned of the result)
if A13 is "Ben Franklin" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#--------Question 14------
display dialog "The __________ declared that England owned all of North America east of the Mississippi" buttons {"Proclomation of England", "Treaty of Paris", "Pontiac Treaty"}
set A14 to (button returned of the result)
if A14 is "" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#-------Question 15-------
display dialog "Braddock was sent to New England so he could ______" buttons {"Command an attack against French", "Scalp the French", "Kill the colonists"}
set A15 to (button returned of the result)
if A15 is "Command an attack against French" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
#------TheLolQuestion-----
display dialog "____ is the name of the teacher who runs this class." buttons {"Mr.White", "Mr.John", "Paul Revere"} default button 1
set LOOL to (button returned of the result)
if LOOL is "Mr.White" then
do shell script "say -v samantha Congratulations…you…have…common…sense"
else
do shell script "say -v alex Do…you…have…eyes?"
#------END------
display dialog "I hope you enjoyed the quiz!" buttons {"I did!", "It was horrible"}
set endmenu to (button returned of the result)
if endmenu is "I did!" then
do shell script "say -v samantha Your awesome"
else
do shell script "say -v alex Go outside and run a lap"
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end if
end ifUse code such as:
display dialog "Around age 11, many boys left their fathers to become…" buttons {"Scholars", "Warriors", "Apprentices"}
set A1 to (button returned of the result)
if A1 is "Apprentices" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
return
end if
#----------Question 2--------
display dialog "Most children were taught to read so that they could understand the…" buttons {"Music of Mozart", "Bible", "art of cooking"}
set A2 to (button returned of the result)
if A2 is "Bible" then
do shell script "say -v samantha Correct Answer"
else
do shell script "say -v samantha Wrong Answer"
return
end if
(90444) -
Need help with inventory program!!! someone please help me!!!
Ok I have to write this inventory program for one of my classes.
For part one i needed to Create a product class that holds the item number, the name of product, the number of units in stock, and the price of each unit.
Then create a java application that displays all of the above info plus the total value of the inventory. I have done this so far with success.
For part two i needed to modify the program so the application can handle multiple items. Use an array to store the items. The output should display the information one product at a time including the item number, the name of the product, the number of units in stock, the price per unit, and the value of the inventory of that product. In addition, the output should display the value of the entire inventory.
so create a method to calculate the value of the entire inventory.(i did this)
and create another method to sort the array items by the name of the product. ( i did this)
The program compiles and runs fine except it is not doing anything from part two. It just does the same thing that it did when i wrote part one.
Does anyone know why or what i need to do to my code.
Here is my code.
import java.util.Scanner; // program uses class Scanner
import java.util.Arrays;
class ProductList
Product[] products = new Product[100]; // an array of 100 pruducts
private void populate() {
products[0] = new Product(0, "Good Luck Chuck" , 25, 4.95);
products[1] = new Product(1, "The Bourne Identity" , 3, 7.95);
products[2] = new Product(2, "The Reaping" , 5, 8.99);
products[3] = new Product(3, "Deja Vu" , 2,12.99);
products[4] = new Product(4, "I Know Who Killed Me" , 3,10.95);
private void sortByTitle() {
private void print() {
for(int i=0; i<products.length; i++) {
System.out.println(products);
private void printTotalInventoryValue() {
System.out.println("Total Inventory Value = "+calculateTotalInventoryValue());
private double calculateTotalInventoryValue() {
double total = 0D;
for(int i=0; i<products.length; i++) {
total += products[i].calculateInventoryValue();
return total;
public static void main( String args[] ) {
ProductList list = new ProductList();
list.populate();
list.sortByTitle();
list.print();
list.printTotalInventoryValue();
} class Product
private int id;
private String title;
private int stock;
private double price;
public Product(int id, String title, int stock, double price) {
setId(id);
setTitle(title);
setStock(stock);
setPrice(price);
public int getId() { return this.id; }
public void setId(int id) { this.id = id; }
public String getTitle() { return this.title; }
public void setTitle(String title) { this.title = title; }
public int getStock() { return this.stock; }
public void setStock(int stock) { this.stock = stock; }
public double getPrice() { return this.price; }
public void setPrice(double price) { this.price = price; }
public double calculateInventoryValue() {
return getStock() * getPrice();
public class Inventorypt2
private String ProductInfo; // call class product info
public static void main(String args[])
//create Scanner to obtain input from command window
Scanner input = new Scanner( System.in );
int num; // product's item number
int stock; // number of items in stock
double price; // price each of item
ProductInfo product; // product information instance
System.out.println(); // blank line
String name = "go";
// loop until sentinel value read from user
while ( !name.equalsIgnoreCase ("stop") )
System.out.print( "Enter DVD title, or STOP to quit: "); // prompt
name = input.nextLine(); // read item name from user or quit
System.out.print( "Enter the item number: "); // prompt
num = input.nextInt(); // read item number from user
while ( num <=0 ) //loop until item number is positive
System.out.println ("Item number must be positive. Please re-enter item number: ");//prompt user to re-enter item number
num = input.nextInt(); // read item number
} //end while
System.out.print( "Enter the quantity in stock: "); // prompt
stock = input.nextInt(); // read stock quantity from user
while ( stock <0 ) //loop until stock is positive
System.out.println ("Quantity in stock can not be less than zero. Please re-enter the quantity in stock: ");//prompt user to re-enter quantity in stock
stock = input.nextInt(); // read stock quantity from user
} //end while
System.out.print( "Enter the price of DVD: "); // prompt
price = input.nextDouble(); // read item price from user
while ( price <=0 ) //loop until price is positive
System.out.println ("Product price must be positive. Please re-enter the price of the product: ");//prompt user to re-enter product price
price = input.nextDouble(); // read item price from user
} //end while
product = new ProductInfo( num, name, stock, price); // initialize ProductInfo variables
System.out.println(); // blank line
System.out.printf( "Item Name: %S\n", product.getName());
System.out.printf( "Item Number: %s\n", product.getNum());
System.out.printf( "Qty. in Stock: %s\n", product.getStock());
System.out.printf( "Price Each: $%.2f\n", product.getPrice());
System.out.printf( "Total Value in Stock: $%.2f\n", product.getInventoryTotal());
System.out.println(); // blank line
System.out.print( "Enter DVD title, or STOP to quit: "); // prompt
name = "";
while ( name.equals("") )
name = input.nextLine(); // read new product name from user or quit
} //end while
System.out.println(); // blank line
System.out.println("Good Bye!"); // exit message
Edited by: jay1981 on Mar 16, 2008 2:07 PMYou will get more help if your code is formatted better:
* Only post code that is already formatted correctly including indentations.
* Get rid of all those comments cluttering up your code.
* Make sure your posted code compiles without need for any changes. Yours doesn't at present. Where is the ProductInfo class?
Again, you want it easy for a volunteer here to read your post, otherwise he/she simply won't do it. Good luck. -
Need help with case structures- please help :)
Hey all.
I'm currently trying to program a infrared furnace. I'm setting a temperature, subtracted my set temperature from the actual temperature (thermocouple hooked up to SCB-68), and voltage is being sent to the controller of the furnace accordingly. However, I need to hold the set temperature for a certain amount of time. I need help programming this: when the VI reads the set temperature from the thermocouple, it results in a timer running down. When the timer runs down to 0, the While Loop ends. I'm thinking case structures is most appropriate, but if you have a better suggestion, please let me know.
ThanksYou should probably implement a state machine.
The state machine would keep track of the temperature and making ajustments on a timely basis.
There is a template of a state machine is you select under the File menu > New > From Template.
You can also look under Help > Find Example > and do a search for state machine.
There are lots of state machine examples on this forum, some of which may be quite useful.
RayR -
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? -
New to Java and need help with this program..please!
I'd really appreciate any helpful comments about this program assignment that I have to turn in a week from Friday. I'm taking a class one night a week and completely new to Java. I'd ask my professor for help, but we can't call him during the week and he never answers e-mails. He didn't tell us how to call from other classes yet, and I just can't get the darn thing to do what I want it to do!
The assignment requirements are:
1. Change a card game application that draws two cards
and the higher card wins, to a Blackjack application
2. Include a new class called Hand
3. The Hand class should record the number of draws
4. The application should prompt for a number of draws
5. The game is played against the Dealer
6. The dealer always draws a card if the dealer's hand total is <= 17
7. Prompt the player after each hand if he wants to quit
8. Display the total games won by the dealer and total and the total games wond by the player after each hand
9. Display all of the dealer's and player's cards at the
end of each hand
10. Player has the option of drawing an additional card after the first two cards
11. The Ace can have a value of 11 or 1
(Even though it's not called for in the requirements, I would like to be able to let the Ace have a value of 1 or an 11)
The following is my code with some comments about a few things that are driving me nuts:
import java.util.*;
import javax.swing.*;
import java.text.*;
public class CardDeck
public CardDeck()
deck = new Card[52];
fill();
shuffle();
public void fill()
int i;
int j;
for (i = 1; i <= 13; i++)
for (j = 1; j <= 4; j++)
deck[4 * (i - 1) + j - 1] = new Card(i, j);
cards = 52;
public void shuffle()
int next;
for (next = 0; next < cards - 1; next++)
int rand = (int)(Math.random()*(next+1));
Card temp = deck[next];
deck[next] = deck[rand];
deck[rand] = temp;
public final Card draw()
if (cards == 0)
return null;
cards--;
return deck[cards];
public int changeValue()
int val = 0;
boolean ace = false;
int cds;
for (int i = 0; i < cards; i++)
if (cardValue > 10)
cardValue = 10;
if (cardValue ==1) {
ace = true;
val = val + cardValue;
if ( ace = true && val + 10 <= 21 )
val = val + 10;
return val;
public static void main(String[] args)
CardDeck d = new CardDeck();
int x = 3;
int i;
int wins = 1;
int playerTotal = 1;
do {
Card dealer = (d.draw());
/**I've tried everything I can think of to call the ChangeValue() method after I draw the card, but nothing is working for me.**/
System.out.println("Dealer draws: " + dealer);
do {
dealer = (d.draw());
System.out.println(" " + dealer);
}while (dealer.rank() <= 17);
Card mine = d.draw();
System.out.println("\t\t\t\t Player draws: "
+ mine);
mine = d.draw();
System.out.println("\t\t\t\t\t\t" + mine);
do{
String input = JOptionPane.showInputDialog
("Would you like a card? ");
if(input.equalsIgnoreCase("yes"))
mine = d.draw();
System.out.println("\t\t\t\t\t\t" + mine);
playerTotal++;
else if(input.equalsIgnoreCase("no"))
System.out.println("\t\t\t\t Player stands");
else
System.out.println("\t\tInvalid input.
Please try again.");
I don't know how to go about making and calling a method or class that will combine the total cards delt to the player and the total cards delt to the dealer. The rank() method only seems to give me the last cards drawn to compare with when I try to do the tests.**/
if ((dealer.rank() > mine.rank())
&& (dealer.rank() <= 21)
|| (mine.rank() > 21)
&& (dealer.rank() < 22)
|| ((dealer.rank() == 21)
&& (mine.rank() == 21))
|| ((mine.rank() > 21)
&& (dealer.rank() <= 21)))
System.out.println("Dealer wins");
wins++;
else
System.out.println("I win!");
break;
} while (playerTotal <= 1);
String stop = JOptionPane.showInputDialog
("Would you like to play again? ");
if (stop.equalsIgnoreCase("no"))
break;
if (rounds == 5)
System.out.println("Player wins " +
(CardDeck.rounds - wins) + "rounds");
} while (rounds <= 5);
private Card[] deck;
private int cards;
public static int rounds = 1;
public int cardValue;
/**When I try to compile this nested class, I get an error message saying I need a brace here and at the end of the program. I don't know if any of this code would work because I've tried adding braces and still can't compile it.**/
class Hand()
static int r = 1;
public Hand() { CardDeck.rounds = r; }
public int getRounds() { return r++; }
final class Card
public static final int ACE = 1;
public static final int JACK = 11;
public static final int QUEEN = 12;
public static final int KING = 13;
public static final int CLUBS = 1;
public static final int DIAMONDS = 2;
public static final int HEARTS = 3;
public static final int SPADES = 4;
public Card(int v, int s)
value = v;
suit = s;
public int getValue() { return value; }
public int getSuit() { return suit; }
public int rank()
if (value == 1)
return 4 * 13 + suit;
else
return 4 * (value - 1) + suit;
/**This works, but I'm confused. How is this method called? Does it call itself?**/
public String toString()
String v;
String s;
if (value == ACE)
v = "Ace";
else if (value == JACK)
v = "Jack";
else if (value == QUEEN)
v = "Queen";
else if (value == KING)
v = "King";
else
v = String.valueOf(value);
if (suit == DIAMONDS)
s = "Diamonds";
else if (suit == HEARTS)
s = "Hearts";
else if (suit == SPADES)
s = "Spades";
else
s = "Clubs";
return v + " of " + s;
private int value; //Value is an integer, so how can a
private int suit; //string be assigned to an integer?
}Thank you so much for offering to help me with this Jamie! When I tried to call change value using:
Card dealer = (d.changeValue());
I get an error message saying:
Incompatible types found: int
required: Card
I had my weekly class last night and the professor cleared up a few things for me, but I've not had time to make all of the necessary changes. I did find out how toString worked, so that's one question out of the way, and he gave us a lot of information for adding another class to generate random numbers.
Again, thank you so much. I really want to learn this but I'm feeling so stupid right now. Any help you can give me about the above error message would be appreciated. -
Need help with If statement Please
Hi guys,
This is my first time posting and sorry if for some reason i post incorrectly.
I am having trouble figuring out what I am doing with my if Statement and why the compiler is giving me an error which says 'cannot find symbol';
Just incase you need to see the code here it is. And please any pointers would help me get back on track. And please dont laugh at the novice code i just started^^;
import java.util.*;
import java.text.*;
public class Student
public static void main(String[]args)
Scanner scan=new Scanner(System.in);
double std1, std2, std3, num1, num2, num3, num4;
String a, answer1, name1;
System.out.println("Welcome to _____ program, press any button to continue: ")
a=scan.nextLine();
System.out.println("Good, would you like to enter a grade for a student(y/n)?");
answer1=scan.nextLine();
if (answer1 == y)
System.out.println("Please enter the students name ");
name1=scan.nextLine();
System.out.println("Please label the test number ");
num1=scan.nextDouble();
System.out.println("Please enter the grade, "+name1+" recieved");
std1=scan.nextDouble();
if (answer1==n)
System.out.println("Thank you for trying my program ");
else
System.out.println("It's obvious you couldn't follow a simple direction good bye ");Thanks Flounder,
I'll keep in mind to edit the code the way you told me too.
As far as the code goes, what do you mean 'y' is not a string and should be a variable. All I'm trying to do is give a true false statement.
For example
if (input==y)
System.out.println("________");
And in my code it gives an error stating that y is a variable.
I dont understand why.
Thanks much for all your replies. -
I also need help with a programming assingment. I think I'm almost there!
I have the following assingment to complete:Once again, you realize that you need to upgrade your Java program with two more features:
Be able to print products which are �On Sale�.
Use arrays to store the product names so that you can keep track of your inventory.
After some analysis, you notice that printing the products can be achieved by modifying the two classes you have already written. One approach would be to add a Boolean attribute called �OnSale� to the ToddlerToy and add a print method that print information about a product indicating if it is �On Sale�.
Update your constructor, taking into account the �On Sale� attribute.
Create two more instances: a small train called Train4 and a big train called Train5. Mark both trains �On Sale�
Add another method that prints the sale information
Keeping track of the names of products can be achieved by declaring an array of strings in the ToysManager class itself. Each time a new product is created, it is also added to the array. Use a while construct to print the product names in your inventory.
This is the code I have come up with:
public class ToysManager {
private String toyInventory[] = {"Big Train","Small Train"};
public void printInventory() {
System.out.println("List of Items in Toy Inventory");
for (int i=0; i<toyInventory.length; i++)
{ System.out.println(toyInventory[i])); } // ";"expected - ToysManager.java
public static void main(String[] args) {
//System.out.println("This is the main method of class ToysManager.");
//call on ToysManager printInventory method for a listing of all toy types
printInventory();
// Create ToddlerToy Objects Train1,Train2,Train3,Train4,Train5
ToddlerToy Train1 = new ToddlerToy(489, "Big Train", 19.95,false);
Train1.printOnSale();
ToddlerToy Train2 = new ToddlerToy(489, "Big Train", 19.95,false);
Train2.printOnSale();
ToddlerToy Train3 = new ToddlerToy(477, "Small Train", 12.95,false);
Train3.printOnSale();
ToddlerToy Train4 = new ToddlerToy(477, "Small Train", 12.95,true);
Train4.printOnSale();
ToddlerToy Train5 = new ToddlerToy(489, "Big Train", 19.95,true);
Train5.printOnSale();
} //this is the end bracket for the main method
} //this is the end bracket for the ToysManager class
class ToddlerToy {
// Initialize and Assign Data Types to each Variables
private int productID;
public String productName;
public double productPrice;
private boolean onSale;
public void ToddlerToy(int a, String b, double c, boolean d) {
// Assign Data to Variables
productID = a;
productName = b;
productPrice = c;
onSale = d;
//PrintProductPrice(ProductPrice);
} //end of constructor
public void printOnSale(){
if(onSale == true) System.out.println("This item #" + productID + ": " + productName + "is on sale");
I don't have any problems with class ToddlerToy. I can compile that with no problems. I'm having issues with public class ToysManager. I can't compile that one correctly. It fails at:
{ System.out.println(toyInventory[i])); } // ";"expected - ToysManager.java
I've looked through the java books I have and also online, but I can't figure this out. I'm new to java so any help would be appreciated.
Thanks in advance.Thanks. That got me past that error. I was hung up on that for far too long. I made some changes and when i compile the ToysManager class it shoots a different error. The code now looks like this:
public class ToysManager {
private String toyInventory[] = {"Big Train","Small Train"};
public void printInventory() {
System.out.println("List of Items in Toy Inventory");
for (int i=0; i<toyInventory.length; i++){
System.out.println(toyInventory);
public static void main(String[] args) {
//System.out.println("This is the main method of class ToysManager.");
//call on ToysManager printInventory method for a listing of all toy types
printInventory();
// Create ToddlerToy Objects Train1,Train2,Train3,Train4,Train5
ToddlerToy Train1 = new ToddlerToy(489, "Big Train", 19.95,false);
Train1.printOnSale();
ToddlerToy Train2 = new ToddlerToy(489, "Big Train", 19.95,false);
Train2.printOnSale();
ToddlerToy Train3 = new ToddlerToy(477, "Small Train", 12.95,false);
Train3.printOnSale();
ToddlerToy Train4 = new ToddlerToy(477, "Small Train", 12.95,true);
Train4.printOnSale();
ToddlerToy Train5 = new ToddlerToy(489, "Big Train", 19.95,true);
Train5.printOnSale();
} //this is the end bracket for the main method
} //this is the end bracket for the ToysManager class
I get an illegal start of expression for:
public static void main(String[] args) {
and ";" expected for:
} //this is the end bracket for the main method
I looked over my initial code, before the "for" loop?, and the public static void main was a valid statement. -
Need help with inverter program
I am very new to labview and I need a lot of help fast. I have been given this vi program, which I have attached, that operates a bunch of inverters. The program is driving the inverter which in turn drives the agitator on a washing machine. The agitator goes in forward and reverse direction as a result of a relay within the inverter being supplied voltage to make it open and close. I need to supply voltage to the relay to make it go forward, reverse, and the pause before the next cycle begins. The current program has it doing a forward reverse and then immediately starts the next cycle. If any one can take a look at this program and let me know, first of all what the heck is going on, and second how to fix my problem, that would be incredibly helpful to me. If anyone has trouble opening the file let me know, I think attaching the vi should work but it may also look for a dll file or something when trying to open. Email me if you cannot open the file and I will send you the dll file as well. Your help is greatly appreciated. Thank you very much.
Tony
Attachments:
main2.vi 162 KBHello Tony,
you programmed it to run continously...
After the timed while loop runs through your array of ramp values you start again at index 0 (upper shift register). Instead of this end this while loop by combining the output from the comparison with your stop2 button (end loop when stop2 OR end of arrray). Now it will work.
Btw. why do you use "Insert to Array" when you want to concat 3 arrays (sequence frame 0)? Just use a "Build Array" and set "Concat Inputs" via mouse right-click.
Best regards,
GerdW
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome -
I need help with my setup Please !!! 2800+ athlon xp
hi all .......... great forum here.....!!!
I am having probs with my new setup and I am at a wits end of what to do so i'll explain my problem.
I have just bought a AMD athlon 2800+ cpu for my mobo (KT3 ultra 6830e v.1.0)
and I am unable to run the chip at correct speed??
The bios wont boot the computer if I try to set the fsb for cpu at 166 ?? Am I correct in thinking that a 2800+ Athlon needs to be run at 166fsb to get the 333fsb setting?
I am currently running it at 133fsb and it is registering it as a AMD 2200+ chip ???
I am quite new to playing about with my bios but at the moment it is set at defaults on everything because i had to reset the cmos jumper about 8 times last night after trying different settings, in the end i gave up and thought i'd ask u guys for help???? Please !!!
I spoke to the shop i bought the chip from and we got talking about that when i set the fsb for chip to 166 it changed the ram settings to host clock + 66 (host clock was set at 100mhz) thus trying to make my 2100 ram(266) run at 2700(333) specs ?
Is this the problem why my computer wont boot when it is set to 166 fsb cuz it is asking the ram to be 333ddr when it isn't???
Is my problem going to be solved if i purchase some 2700 ram ?? if so i'll be quite happy, or is my board just not capable of running this 2800+ cpu on it???
i read up b4 i bought the cpu and i thought i was able to run this chip maybe i read wrong? any help would be greatly appreciated , oh i also flashed my bios to the most recent msi update which was 5.7 i think (AMI bios) and the flash was succesfull (LOL) very worrying!!!!
anyway hope i have explained my problem well enough as i myself am very confused!!!!
Thanks in advance
Davei have just had a look around the net and it looks like there are two versions of the 2600+ available one with 133/266fsb support and the other with 333fsb ???
Do u know that if i take my 2800+ back to the shop and change it for a 2600+ cpu if i should just get a normal one(133/266fsb) or get the 333fsb version???
as that link u posted for the mobo supported cpus only lists the 2600+ as being a 133/266fsb chip ???
I will get some 333ddr ram as well just incase i need this to allow the 2600+ to run correctly
Also (sorry to be a pain) but can you explain to me how to change the multipliers correctly to get full power from the chip ?? as i read that a 2600+ comes out at 1.91ghz standard , but i was reading a review where the user was told by AMD that it will run higher by changing fsb or multipliers (or both?) ???
Do u have to set the fsb to 133 and then change the multiplier to a value to up the speed or just keep changing the fsb alone and leave the multipliers alone ????
Hope you can help me......
Thanks once again for your replys..
Dave -
I need help with this program ( Calculating Pi using random numbers)
hi
please understand that I am not trying to ask anymore to do this hw for me. I am new to java and working on the assignment. below is the specification of this program:
Calculate PI using Random Numbers
In geometry the ratio of the circumference of a circle to its diameter is known as �. The value of � can be estimated from an infinite series of the form:
� / 4 = 1 - (1/3) + (1/5) - (1/7) + (1/9) - (1/11) + ...
There is another novel approach to calculate �. Imagine that you have a dart board that is 2 units square. It inscribes a circle of unit radius. The center of the circle coincides with the center of the square. Now imagine that you throw darts at that dart board randomly. Then the ratio of the number of darts that fall within the circle to the total number of darts thrown is the same as the ratio of the area of the circle to the area of the square dart board. The area of a circle with unit radius is just � square unit. The area of the dart board is 4 square units. The ratio of the area of the circle to the area of the square is � / 4.
To simuluate the throwing of darts we will use a random number generator. The Math class has a random() method that can be used. This method returns random numbers between 0.0 (inclusive) to 1.0 (exclusive). There is an even better random number generator that is provided the Random class. We will first create a Random object called randomGen. This random number generator needs a seed to get started. We will read the time from the System clock and use that as our seed.
Random randomGen = new Random ( System.currentTimeMillis() );
Imagine that the square dart board has a coordinate system attached to it. The upper right corner has coordinates ( 1.0, 1.0) and the lower left corner has coordinates ( -1.0, -1.0 ). It has sides that are 2 units long and its center (as well as the center of the inscribed circle) is at the origin.
A random point inside the dart board can be specified by its x and y coordinates. These values are generated using the random number generator. There is a method nextDouble() that will return a double between 0.0 (inclusive) and 1.0 (exclusive). But we need random numbers between -1.0 and +1.0. The way we achieve that is:
double xPos = (randomGen.nextDouble()) * 2 - 1.0;
double yPos = (randomGen.nextDouble()) * 2 - 1.0;
To determine if a point is inside the circle its distance from the center of the circle must be less than the radius of the circle. The distance of a point with coordinates ( xPos, yPos ) from the center is Math.sqrt ( xPos * xPos + yPos * yPos ). The radius of the circle is 1 unit.
The class that you will be writing will be called CalculatePI. It will have the following structure:
import java.util.*;
public class CalculatePI
public static boolean isInside ( double xPos, double yPos )
public static double computePI ( int numThrows )
public static void main ( String[] args )
In your method main() you want to experiment and see if the accuracy of PI increases with the number of throws on the dartboard. You will compare your result with the value given by Math.PI. The quantity Difference in the output is your calculated value of PI minus Math.PI. Use the following number of throws to run your experiment - 100, 1000, 10,000, and 100,000. You will call the method computePI() with these numbers as input parameters. Your output will be of the following form:
Computation of PI using Random Numbers
Number of throws = 100, Computed PI = ..., Difference = ...
Number of throws = 1000, Computed PI = ..., Difference = ...
Number of throws = 10000, Computed PI = ..., Difference = ...
Number of throws = 100000, Computed PI = ..., Difference = ...
* Difference = Computed PI - Math.PI
In the method computePI() you will simulate the throw of a dart by generating random numbers for the x and y coordinates. You will call the method isInside() to determine if the point is inside the circle or not. This you will do as many times as specified by the number of throws. You will keep a count of the number of times a dart landed inside the circle. That figure divided by the total number of throws is the ratio � / 4. The method computePI() will return the computed value of PI.
and below is what i have so far:
import java.util.*;
public class CalculatePI
public static boolean isInside ( double xPos, double yPos )
double distance = Math.sqrt( xPos * xPos + yPos * yPos );
public static double computePI ( int numThrows )
Random randomGen = new Random ( System.currentTimeMillis() );
double xPos = (randomGen.nextDouble()) * 2 - 1.0;
double yPos = (randomGen.nextDouble()) * 2 - 1.0;
int hits = 0;
int darts = 0;
int i = 0;
int areaSquare = 4 ;
while (i <= numThrows)
if (distance< 1)
hits = hits + 1;
if (distance <= areaSquare)
darts = darts + 1;
double PI = 4 * ( hits / darts );
i = i+1;
public static void main ( String[] args )
Scanner sc = new Scanner (System.in);
System.out.print ("Enter number of throws:");
int numThrows = sc.nextInt();
double Difference = PI - Math.PI;
System.out.println ("Number of throws = " + numThrows + ", Computed PI = " + PI + ", Difference = " + difference );
}when I tried to compile it says "cannot find variable 'distance' " in the while loop. but i thought i already declare that variable in the above method. Please give me some ideas to solve this problem and please check my program to see if there is any other mistakes.
Thanks a lot.You've declared a local variable, distance, in the method isInside(). The scope of this variable is limited to the method in which it is declared. There is no declaration for distance in computePI() and that is why the compiler gives you an error.
I won't check your entire program but I did notice that isInside() is declared to be a boolean method but doesn't return anything, let alone a boolean value. In fact, it doesn't even compute a boolean value. -
Need Help With Shell Programming
Hi, I need some guidance as to how to approach my project.
I need to develop a shell to host an e-learning environment that can be accessed through the internet. The user, preferably, needs not to download anything to run/start the e-learning environment. This e-learning environment allows users/students to create a forum, create a chatroom, hand up projects, send mail, do surveys and tutorials online and these can be submitted to the teacher/marker and receive feedback and also view their grades and schedule. Eg, Blackboard http://www.blackboard.com/
The problem is is that there seems to be no shell programming by using java. I have found only shell programming using UNIX, korn and C. I read other posts in the forums here concerning shell programming and alot of the codes include the first 2 lines :
Runtime rt = Runtime.getRuntime();
String command = "your_shell_script_command";
try {
Process process = rt.exec(command);
from = new BufferedReader(new InputStreamReader(process.getInputStream()));
to = new PrintWriter(process.getOutputStream(), true);
catch (IOException e) { ... }the above codes were taken from this post: http://forum.java.sun.com/thread.jsp?forum=57&thread=352231
Does it means that I need to use another language besides Java to program a shell and then run it together with my java program? If so, what language do I need to learn and what Java "component" do I need to use? and is it possible to run a shell in an applet, since the applet is viewable through a browser?
I really need some help on this problem as I don't have a clue to go about it at all. Thanks in advance.er, actually the applet does not seem to load at all.
But from what you have written, yeah, I need to
process the user's input and in my case, his
selected/choosen options in a menu.
E.g, the user wants to create a forum, he/she chooses
the create forum option from the menu which is part of
the shell and something happens which allows the user
to customise the forum.
So, let me get this straight, I can create an applet
and run the shell on the applet and the user can view
this application without downloading anything? As YAT said...providing they have the java plugin...yes... if you keep it to java.applet.Applet (AWT) and not JApplet, you should even have more users able to run it without 'downloading' anything..
Now..to be clear... they ARE downloading your .class files, and running them within a JVM on their own local machine... But they will not need anything (assuming their browser supports the Java version you write in) else...
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