Length () error !!!

Question

Hi
when i clicked an exit button inside ActionListener the program will automatically quits...
Ok , i add a JTextArea in main function did so...
String textenter = textarea.getText();  //textarea object of JTextArea
int len = textenter.length(); i calculates the length of textarea...
and when user clicks exit button..
class ExitListener implements ActionListener
     public void actionPerformed(ActionEvent evtexit)
          if(len >=1)
          System.out.println("Success " + len);
     }But i am getting errors its not calculating length at runtime....
Would anybody help me...

Answer 1

if you really want to use the len variable
then you should create the object with the len as:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.JTextArea;
public class Pad
static JFrame frame;
static JMenuBar menuBar;
static JPanel panel;
static JTextArea textarea;
//main
public static void main(String args[])
     frame = new JFrame();
     frame.setTitle("Pad");
//menubar
     menuBar = new JMenuBar();
//menu
     JMenu file = new JMenu("File");
     menuBar.add(file);     
     JMenuItem exit = new JMenuItem("Exit");
     textarea = new JTextArea(35,30);
     textarea.setText("He testing...");
     file.add(exit);
     panel = new JPanel();
     panel.add(textarea);
    String textenter = textarea.getText();
    int len = textenter.length();
     frame.getContentPane().add(panel);
     frame.setJMenuBar(menuBar);
     frame.setDefaultCloseOperation(3);
     frame.pack();
     frame.setVisible(true);
     frame.setSize(500,300);
//exit button
     ExitListener exobj = new ExitListener();
     exobj.setLen(len);
     exit.addActionListener(exobj);
class ExitListener implements ActionListener
     private int len;
public void actionPerformed(ActionEvent evtexit)
     if(len >=1)
     System.out.println("Success " + len);
     System.exit(0);
public int getLen() {
     return len;
public void setLen(int len) {
     this.len = len;
}you can change the variables of EXitListenerObject
ayberk cansever