Need help to solve my problem

[Copro]

What is the wrong with my program

need help!

import javax.swing.*;
import java.text.DecimalFormat;
public class MyMenuCS {
	public static void main (String[] args) {
		String ch;
		int n;
		int choice;
		for(n=JOptionPane.showConfirmDialog(null,"Do you want to continue","Really Quit",JOptionPane.YES_NO_OPTION);
		ch=JOptionPane.showInputDialog(" MENU OF OPERATIONS\n\n"+
									   " [1] Addition\n" +
									   " [2] Subtraction\n" +
									   " [3] Multiplication\n" +
									   " [4] Division\n" +
									   " [0] Quit\n\n" +
									   "Enter your choice: ");
		choice=Integer.parseInt(ch);     [COLOR="red"][B]<-------')' expected[/B][/COLOR]
		switch(choice) {
			case 1:
				JOptionPane.showMessageDialog(null,"Addition is selected.");
					String in1,in2;
					int a,b,sum;
					in1=JOptionPane.showInputDialog("Enter The First Number:");
					in2=JOptionPane.showInputDialog("Enter The Second Number:");
					a=Integer.parseInt(in1);
					b=Integer.parseInt(in2);
					sum=a+b;
					JOptionPane.showMessageDialog(null,"The sum is:"+sum);
				System.exit(0);
				break;
			case 2:
				JOptionPane.showMessageDialog(null,"Subtraction is selected.");
				break;
			case 3:
				JOptionPane.showMessageDialog(null,"Multiplication is selected.");
				break;
			case 4:
				JOptionPane.showMessageDialog(null,"Division is selected.");
				break;
			case 0:
				break;
			default:
				JOptionPane.showMessageDialog(null,"ERROR: Invalid choice.","Error Message",JOptionPane.ERROR_MESSAGE);
				break;
			}//switch
		}//for
		System.exit(0);       [COLOR="Red"][B] <----------<identifier> expected[/B][/COLOR]
	}//main
}//class          [COLOR="red"][B]<----'class' or 'interface' expected[/B][/COLOR]

[Eranga]

for(n=JOptionPane.showConfirmDialog(null,"Do you want to continue","Really Quit",JOptionPane.YES_NO_OPTION);

What this line do in your code? Do you know how to define a for loop in correct way? Check the above line of code carefully.

[Copro]

Sir Im Just Asking for the correct applying

for

plss help

[Fubarable]

Sir Im Just Asking for the correct applying

It's hard to know how to help as this code is completely futzed. I'm afraid that you can't make up methods and your own strange loops and expect them magically to work. If you want to create a for loop, I suggest that you have a look here at the tutorial on them: The for Statement

[Eranga]

Yes, actually your for loop is totally incorrect. So first of all you must correct that. Fubarable send a nice link to you in his post. Then you've to explain your requirement more clearly, if you really need our help. At the same time, keep in mind that you've to put some effort as well.