Urgent Help: Basic Level Java Programming

Hi,
I am a student taking Java classes, and I need help for a few questions of our Christmas Homework. They are pretty basic stuff and not that hard to do, given that you have the required knowledge. It is really urgent and important, so I would really appreciate it if someone can help.
I am putting here the hardest question in the homework as an example. As I have said, if you are easily able to do this question, please contact me.
"Write a java application that prints the following diamond shape. You may use output statements that print a single asterisk (*), a single space or a single newline character. Maximize your use of repetition (with nested for statements) and minimize the number of output statements."
I cannot draw the diamond here but it goes like this: First line 1 star, second line 3 stars, third line 5 stars, fourth line 7 stars, fifth line 9 stars, and it descends the same way (9 7 5 3 1) to complete the diamond.
Thank you.

Hi,
I am a student taking Java classes, and I need help
for a few questions of our Christmas Homework. They
are pretty basic stuff and not that hard to do, given
that you have the required knowledge. It is really
urgent and important, Not to anyone else but you. We're volunteers, as you should know.
so I would really appreciate it
if someone can help.Isn't that cheating?
Better that you take a shot at it and let people advise you on how to correct problems.
I am putting here the hardest question in the
homework as an example. As I have said, if you are
easily able to do this question, please contact me.Yes, it's easy to do. Hints: Think System.out.println for the stars and two for loops.
"Write a java application that prints the following
diamond shape. You may use output statements that
print a single asterisk (*), a single space or a
single newline character. Maximize your use of
repetition (with nested for statements) and minimize
the number of output statements."
I cannot draw the diamond here but it goes like this:
First line 1 star, second line 3 stars, third line 5
stars, fourth line 7 stars, fifth line 9 stars, and
it descends the same way (9 7 5 3 1) to complete the
diamond.
Thank you.*
Kinda like that...
Think about the steps you'd follow to type this in yourself and then write them out in Java.
%

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I'm sorry too annoy you again but I don't know how to implement what you told me. Here is my current code:
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I'm a complete novice with Java. I want to write a Java program to run on Windows 2000 servers to write a list of certain files in a directory into a *.txt file. I hope to add complexity once I have this basic part working. Here's the code I have so far:
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I'm a complete novice with Java. I want to write a
Java program to run on Windows 2000 servers to write
a list of certain files in a directory into a *.txt
file. I hope to add complexity once I have this
basic part working. Here's the code I have so far:
//this Java application finds poll* files
public class FindPollApp
//Create File Object
File dir = new File("d:/jda/windss/poll");
//List directory
if(dir.isDirectory())
String[] dirContents = dir.list();
for (int i=0; i < dirContents.length; i++)
System.out.println(dirContents);
//Iterate through files
I get the following errors:
C:\JAVA>javac FindPollApp.java
FindPollApp.java:9: illegal start of type
if(dir.isDirectory())
^
FindPollApp.java:18: <identifier> expected
^
2 errors
Thanks.
You need to create a method and insert your if statement in there

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how about if compile fail?
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If, it exists, get its modified time.
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InputStream in = new BufferedInputStream(p.getInputStream());int read;while ((read = in.read()) != -1){ System.out.println((char)read);}
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I have to Write a program that reads two times in military format (0900, 1730) and prints the number of hours and minutes between two times. Supply your own test program. Here are two sample runs. User inputs are the numbers.
Please enter the first time: 0900
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8 hours 30 minutes
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public class TimeInterval
private double hours;
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public TimeInterval(double Time1, double Time2)
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tad2382 wrote:
Jverd,
I'm guessing that in your early days on this forum you must have spent a lot of time explaining constructors, object creation, etc. Now, after some 40K posts to the forum, you figure newbies should just go and read the documentation. Is that what a lot of veteran posters feel?Perhaps the OP is not aware of the fact the Sun has a good deal of high quality study material published on their website. What's wrong with posting it in a thread? Why should one copy the same thing over and over again? If after reading that tutorial, the OP still has some questions about it, s/he is free to post a follow up question. I am sure that many of the regulars here are more than happy to answer them.
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Being one of the (relatively) novice posters on the forum, I still feel the need to customize posts,Well, by all means: do so.
trying to see things from the poster's side. Maybe after a few thousand posts, I'll just keep throwing the same documentation at newbies, instead of detailed customized responses, heh.IMO, that's a load of cr@p.

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char[] fileShortcuts = {'L', 'E'};
char[] dataShortcuts = {'Q', 'A', 'T', 'U'};
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JMenu dataMenu = new JMenu("Data");
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link.addActionListener(printListener);
fileMenu.add(link);
for(int i = 0; i < dataList.length; i++)
JMenuItem link = new JMenuItem(dataList, dataShortcuts);
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link.addActionListener(printListener);
dataMenu.add(link);
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JMenuItem link = new JMenuItem(OptionsList, OptionsShortcuts);
link.setAccelerator(KeyStroke.getKeyStroke(OptionsShortcuts,
Toolkit.getDefaultToolkit( ).getMenuShortcutKeyMask( ), false));
link.addActionListener(printListener);
OptionsMenu.add(link);
add(fileMenu);
add(dataMenu);
add(OptionsMenu);
public static void main(String s[ ]) {
JFrame frame = new JFrame("Student Application");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setJMenuBar(new GUIform( ));
JPanel panel = new JPanel();
panel.setBackground(Color.ORANGE);
frame.pack( );
frame.setSize(300, 200);
frame.setLocation(200, 200);
frame.setVisible(true);

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
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link.setAccelerator(KeyStroke.getKeyStroke(dataShortcuts[i],
Toolkit.getDefaultToolkit( ).getMenuShortcutKeyMask( ), false));
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link.addActionListener(printListener);
dataMenu.add(link);
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link.setAccelerator(KeyStroke.getKeyStroke(OptionsShortcuts[i],
Toolkit.getDefaultToolkit( ).getMenuShortcutKeyMask( ), false));
link.setActionCommand(OptionsList[i]);
link.addActionListener(printListener);
OptionsMenu.add(link);
JMenuBar menuBar = new JMenuBar();
menuBar.add(fileMenu);
menuBar.add(dataMenu);
menuBar.add(OptionsMenu);
return menuBar;

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Here is the problem: Write a program that creates a loan amortization table. The user of the program will supply values for Initial Loan Principal, Annual Percentage Rate and Monthly Payment. The program should print out the appropriate amortization table including the number of Monthly Payments and the Total Interest paid for the life of the loan. The program should allow multiple
runs (up to 4 different versions) of the table process and should allow the
user to compare runs in a tabular format.
This is what I have so far and should work one I completely debug it. I am really new to Java, and I thinks it is somthing to do with the Array. I recently switched from C++ to Java, so I don't think I have the syntax down correctly. Thanks.
import javax.swing.JOptionPane;
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               String Monthly_Payment_String = JOptionPane.showInputDialog(null, "What is the Monthly Payment", "Payment",
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          double[] Interest = new double[]{0,0};
          double[] Remain = new double[]{0,0};
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          double MPR = ((int)((Monthly_Percent + .005) * 100.) / 100.);
          boolean Over = true;
          double Borrowed = Loan;
          int Month = 0;
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               double Rate = MPR * Loan;
               double decimalRate = ((int)((Rate + .005) * 100.) / 100.);
               Interest[index] = decimalRate;
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               double decimalPrince = ((int)((Prince + .005) * 100.) / 100.);
               Principle[index]= decimalPrince;
               double Rmn = Borrowed - decimalPrince;
               Borrowed = Rmn;
               double decimalRmn = ((int)((Rmn + .005) * 100.) / 100.);
               Remain[index] = decimalRmn;
               if(Monthly > Remain[index] && Remain[index] > 0)
                    Monthly = Remain[index];
                    Over = false;
               Month += 1;
          System.out.println("I am here!" + Month);
          System.out.println("Payment #" + " " + "Principle" + " " + "Payment" + " " + "APR" + " " + "MPR" +
           " " + "Interest Payment" + " " + "Principle Payment");
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          for(int index = 0; index < Month; index++)
               System.out.println((index + 1) + "\t" + Remain[index] + "\t" + Percentage + "\t" + MPR + "\t" + Interest[index]
                + "\t" + Principle[index]);
}

Okay, here is my updated code. I am having trouble outputting my formate to align with each category.
import javax.swing.JOptionPane;
import java.text.DecimalFormat;
public class Program_01
     public static void main(String [] args)
          int Runs;
          do
               String Run_Question = JOptionPane.showInputDialog(null, "How many times would you like to run" +
               " the program? (Up to four runs only!)", "Run Question", JOptionPane.QUESTION_MESSAGE);
                Runs = Integer.parseInt(Run_Question);
               if( Runs < 0 || Runs > 4)
                    JOptionPane.showMessageDialog(null, "The number is not valid, try again!", "Error",
                    JOptionPane.INFORMATION_MESSAGE);
          }while(Runs < 0 || Runs > 4);
               Questions(Runs);
     public static void Questions(int Runs)
          for(int index = 0;index < Runs;index ++)
               String Loan_Principle_String = JOptionPane.showInputDialog(null, "What is the Loan Principle?", "Loan Amount",
                                                     JOptionPane.QUESTION_MESSAGE);
               String Percentage_Rate_String = JOptionPane.showInputDialog(null, "What is the Annual Percentage Rate?",
                                                       "Interest Rate", JOptionPane.QUESTION_MESSAGE);
               String Monthly_Payment_String = JOptionPane.showInputDialog(null, "What is the Monthly Payment", "Payment",
                                                       JOptionPane.QUESTION_MESSAGE);
               double Loan_Principle = Double.parseDouble(Loan_Principle_String);
               double Percentage_Rate = Double.parseDouble(Percentage_Rate_String);
               double Monthly_Payment = Double.parseDouble(Monthly_Payment_String);
               Calculate(Loan_Principle, Percentage_Rate, Monthly_Payment);
     public static void Calculate (double Loan, double Percentage, double Monthly)
          double[] Principle = new double[100];
          double[] Interest = new double[100];
          double[] Remain = new double[100];
          double[] Payment = new double[100];
          DecimalFormat Decimal = new DecimalFormat(".00");
          double Total_Interest = 0;
          double T_Interest;
          double Monthly_Percent = (Percentage/12)/100;
          double MPR = Monthly_Percent;
          boolean Over = true;
          double Borrowed = Loan;
          double Deposit = Monthly;
          int Month = 0;
          for (int index = 0; Over = true; index++)
               double Rate = MPR * Borrowed;
               double decimalRate = round(Rate,2);
               Interest[index] = decimalRate;
               Remain[index] = Borrowed;
               Month += 1;
               if(Monthly > Remain[index ] && Remain[index ] > 0)
                    for(int count = 0; count <= Month; count++)
                         Total_Interest += Interest[count];
                    T_Interest = round(Total_Interest,2);
                    Payment[index] = T_Interest;
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                    Payment[index] = Deposit;
               double Prince = Deposit - decimalRate;
               double decimalPrince = round(Prince,3);
               Principle[index]= decimalPrince;
               System.out.println("I am here!" + decimalPrince);
               double Rmn = Borrowed - decimalPrince;
               double decimalRmn = round(Rmn,2);
               Borrowed = decimalRmn;
               if(Monthly > Remain[index ] && Remain[index ] > 0)
                    Over = false;
                    break;
          System.out.println("Payment #" + " " + "Principle" + " " + "Payment" + " " + "Percentage" + " " + "MPR" +
           " " + "Interest Payment" + " " + "Principle Payment");
          System.out.println("----------------------------------------------------------------------------");
          for(int index = 0; index < Month; index++)
               System.out.println("   " + (index + 1) + "\t   " + Decimal.format(Remain[index]) + "   " +
               Decimal.format(Payment[index]) + "   " + Decimal.format(Percentage) + "     " + MPR +
               "\t" + Decimal.format(Interest[index]) + "\t\t" + Decimal.format(Principle[index]));
          T_Interest = ((int)((Total_Interest + .005) * 100.) / 100.);
          System.out.println("\n\t\t\t" + "Total Interest Paid \t" + T_Interest + "\n");
          for(int index = 0; index < Month; index++)
               System.out.printf("%f %f\n", Principle[index],Remain[index]);
     public static double round(double val, int places) {
     long factor = (long)Math.pow(10,places);
     // Shift the decimal the correct number of places
     // to the right.
     val = val * factor;
     // Round to the nearest integer.
     long tmp = Math.round(val);
     // Shift the decimal the correct number of places
     // back to the left.
     return (double)tmp / factor;
}

Help please with java programming

ok so i need a little help on getting started on this program.
i need to make a program where the user can enter the last names of candidates and the votes recieved by each candidate. then the program should output both the candidates names and the total votes recieved by each candidate and the perctage of votes each recieved.
can anyone help me get started with some sample code. thanks.

ok so this is what i have so far . . . . it goes through the array and works.
im suppose to also have these two methods . . .
sumVotes- Which will receive the votes array by reference.
Calculate the total votes.- Return the calculated integral total votes.winnerIndex- Which will receive the votes array by reference.- Identify the top candidate who received more votes. - Return the identified index.
my program is suppose to do this . . .The program should then output each candidate?s name, votes received by that candidate, and the percentage of the total votes received by the candidate. The program should also output the winner of the election.
ok so anyone out there nice enough to tutor me through making these 2 methods i need?
here is code of what i have so far
package assign11942;
import javax.swing.*;
public class Assign11942 {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          String strLast[],strNumCand, strVotes[];
          int numCand;
          double votes[], percentage, totalVotes[];
          strNumCand = JOptionPane.showInputDialog("Enter Number of Candidates: ");
          numCand = Integer.parseInt(strNumCand);
          strLast=new String[numCand];
          strVotes=new String[numCand];
          votes=new double[numCand];
          totalVotes=new double[numCand];
          for (int i =0 ; i < numCand; i++) {
               strLast= JOptionPane.showInputDialog("Enter Candidates Last Name: ");
               strVotes[i]=JOptionPane.showInputDialog("Enter Number of Votes: ");

Help with some Java Programs

Hi all ..
i am a new in Java and i need some help with my School Project ,,,
Will you help me ??
regards,
Toota

People here will answer questions and comment on your code, but don't ecpect them to debug your source nor do your homework for you.

Help with inventory Java program

Hello,
I've been working on this and couldn't get what's the problem is :(
Can somebody explain to me what would be the problems?
import java.util.Scanner;
public class Product
     public static void main(String[] args)
               Scanner s = new Scanner(System.in);
               System.out.print("Enter the item number: ");
               int item = s.nextInt();
               System.out.print("Enter the product name: ");
               String product = s.next();
               System.out.print("Enter the unit: ");
               int unit = s.nextInt();
               System.out.print("Enter the price for each unit: ");
               double price = s.nextDouble();
               product p = new product(item, product, unit, price);
               System.out.println("You entered: ");
               System.out.print("Item: " + p.getItemNumber() + "\nProduct: " + p.getProductName() + "\nUnits: " + p.getUnits() + "\nPricePerUnit: " + p.getPriceUnit() + "\n");
               System.out.println("Here is the value of inventory :" + p.getPriceInventory());
class Inventory1
     private int itemNumber;
     private String productName;
     private int Unit;
     private double priceUnit;
     public Inventory1(int itemNumber, String productName, int Unit, double priceUnit)
          this.itemNumber = itemNumber;
          this.productName = productName;
          this.Unit = Unit;
          this.priceUnit = priceUnit;
     public int getItemNumber()
          return itemNumber;
     public void setItemNumber(int itemNumber)
          this.itemNumber = itemNumber;
     public double getPriceUnit()
          return priceUnit;
     public void setPriceUnit(double priceUnit)
          this.priceUnit = priceUnit;
     public String getProductName()
          return productName;
     public void setProductName(String productName)
          this.productName = productName;
     public int getUnit()
          return Unit;
     public void setUnit(int Unit)
          this.Unit = Unit;
     public double getPriceInventory()
          double number = getUnit() * getPriceUnit();
          return number;
}Build output:
--------------------Configuration: <Default>--------------------
java:10: class Product is public, should be declared in a file named Product.java
public class Product
       ^
TestProduct.java:23: cannot find symbol
symbol : class product
location: class Product
            product p = new product(item, product, unit, price);
            ^
TestProduct.java:23: cannot find symbol
symbol : class product
location: class Product
            product p = new product(item, product, unit, price);
                            ^
3 errors
Process completed.General output:
java.lang.NoClassDefFoundError: Product
Caused by: java.lang.ClassNotFoundException: Product
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main"
Process completed.Help!!
Thank you in advance

I adjusted and this time it says:
Build Output
--------------------Configuration: <Default>--------------------
16: cannot find symbol
symbol : variable product
location: class Product
            Product p = new Product(item, product, unit, price);
                                          ^
16: internal error; cannot instantiate Product.<init> at Product to ()
            Product p = new Product(item, product, unit, price);
                        ^18: cannot find symbol
symbol : method getItemNumber()
location: class Product
            System.out.print("Item: " + p.getItemNumber() + "\nProduct: " + p.getProductName() + "\nUnits: " + p.getUnits() + "\nPricePerUnit: " + p.getPriceUnit() + "\n");
                                         ^
18: cannot find symbol
symbol : method getProductName()
location: class Product
            System.out.print("Item: " + p.getItemNumber() + "\nProduct: " + p.getProductName() + "\nUnits: " + p.getUnits() + "\nPricePerUnit: " + p.getPriceUnit() + "\n");
                                                                             ^
18: cannot find symbol
symbol : method getUnits()
location: class Product
            System.out.print("Item: " + p.getItemNumber() + "\nProduct: " + p.getProductName() + "\nUnits: " + p.getUnits() + "\nPricePerUnit: " + p.getPriceUnit() + "\n");
                                                                                                                ^
18: cannot find symbol
symbol : method getPriceUnit()
location: class Product
            System.out.print("Item: " + p.getItemNumber() + "\nProduct: " + p.getProductName() + "\nUnits: " + p.getUnits() + "\nPricePerUnit: " + p.getPriceUnit() + "\n");
                                                                                                                                                    ^
19: cannot find symbol
symbol : method getPriceInventory()
location: class Product
            System.out.println("Here is the value of inventory :" + p.getPriceInventory());
                                                                     ^
7 errors
Process completed.General Output
--------------------Configuration: <Default>--------------------
java.lang.NoClassDefFoundError: Product
Caused by: java.lang.ClassNotFoundException: Product
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
Exception in thread "main"
Process completed.(>_<)
I forgot to mention...
That I need to create a product class that holds the item number, the name of the product, the number of units in stock and the price of each unit (I think I got this part)
I need to create a Java application that displays the product number, the name of the product, the number of units in stock, the price of each unit, and the value of the inventory (the number of units in stock multiplied by the price of each unit).
Edited by: yodartas on Sep 27, 2008 7:54 PM

Urgent help needed in Java Strings

Hi guys/gals..
I want to know how to i Capitalize onlt the first Alphabet of a String.
Eg if i hav the string "swing". i need it as "Swing" ie the first alpha shud be capitalized. How to do tat. The Java method of toUpperCase wud be of now use since it capitalizes the whole string.
Tks.
Divya...

I use this. Maybe not the most optimal way, but it works :)
     public static String capString(String inp)
      byte[] buf = inp.getBytes();
      // first character is between 'a' and 'z', substract 32 from it to capitalize the character
      if(buf[0] >= 97 && buf[0] <= 122)
       buf[0] -= 32;
      return new String(buf);
     }

Help me for java programming about ATM machine

can anyone make a program for me or fix my program? cause i got some of the errors that i can not fix....
my school project duedate at 14 july2001
please email me at [email protected]
Thanks

but show me the code to solve your problem.

Urgent Help: Basic Level Java Programming

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