Palindrome

[pinkdreammsss]

guyz , ive done an pplet that gets the number n shows the reverse form of it . im gonna add a function that decides if the reversed number imy pSs palindrome or not ... do u have any idea ?
here's my program :

/**
 * @(#)actionListener.java
 *
 * actionListener Applet application
 *
 * @author 
 * @version 1.00 2010/4/21
 */
 
import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class reverse extends Applet implements ActionListener {

	private Label enterno1,result1;
	private TextField enterno2,result2;
	private Button reverse,clear;
		
	public void init() {
		
	enterno1=new Label(" Enter your number : ");
	result1=new Label(" Reverse Form");
	reverse=new Button("REVERSE ! ");
	clear=new Button("CLEAR");
	enterno2=new TextField(10);
	result2=new TextField(10);
	
	add(enterno1);
	add(enterno2);
	
	add(result1);
	add(result2);
	
	add(reverse);
	add(clear);
	
	
	reverse.addActionListener(this);
		clear.addActionListener(this);
		
	}
	
	public void actionPerformed(ActionEvent e){
		String rev="";
		if (e.getSource()==reverse){
			
			int num=Integer.parseInt(enterno2.getText());
		int r;
		while (num!=0){
		
		 r=num%10;
			num=num/10;
			rev+=r;
		}
		}
			result2.setText(rev);
	
		}
	}

[PhHein]

if(text.equals(new StringBuilder(text).reverse().toString())){
   System.out.println("A palindrome!");
}

[dswastik]

Store the original number to a string, store the reversed number to another string. Now compare these two strings, if equal makes a palindrome. Correct me if I am wrong.

[pinkdreammsss]

if(text.equals(new StringBuilder(text).reverse().toString())){
   System.out.println("A palindrome!");
}

dude i don get this ! would ya put into my code so i can understand it better ?tnx

[PhHein]

WTF?! Put it in there yourself. If you don't understand it you might want to look at the API docs.

[pinkdreammsss]

alright , at least tell me in which part of below code , im doin wrong :

/**
 * @(#)actionListener.java
 *
 * actionListener Applet application
 *
 * @author 
 * @version 1.00 2010/4/21
 */
 
import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class reverse extends Applet implements ActionListener {

	private Label enterno1,result1,palindrome;
	private TextField enterno2,result2;
	private Button reverse,clear;
		
	public void init() {
		
	enterno1=new Label(" Enter your number : ");
	result1=new Label(" Reverse Form");
	reverse=new Button("REVERSE ! ");
	clear=new Button("CLEAR");
	enterno2=new TextField(10);
	result2=new TextField(10);
	palindrome=new Label("Palindrome");
	
	add(enterno1);
	add(enterno2);
	
	add(result1);
	add(result2);
	
	add(reverse);
	add(clear);
	add(palindrome);
	
	
	reverse.addActionListener(this);
		clear.addActionListener(this);
		
	}
	
	public void actionPerformed(ActionEvent e){
		String rev="";
		if (e.getSource()==reverse){
			
			int num=Integer.parseInt(enterno2.getText());
		int r;
		while (num!=0){
		
		 r=num%10;
			num=num/10;
			rev+=r;
		}
		}
		
		if(result2==(new StringBuilder(rev).reverse().toString())){
   		palindrome.setText("A palindrome!");
}
			result2.setText(rev);
	
		}
	}

[PhHein]

The problem is that you try to compare String with TextFields. That doesn't make sense.

[pinkdreammsss]

so what am i suppose to do then ? what to change in code?

[dswastik]

if(result2.getText().equals(new StringBuilder(rev).reverse().toString())){