Loop只运行一次

Question

我的问题是,当我运行它时,我的while循环只运行一次.这是我的代码.如果有人检查它并且可能寻找其他错误(我是编程java的新手!),我将非常感激.

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;


public class Program {

    boolean exit;
    JFrame frame;
    JPanel panel;
    JTextField title;
    JButton start;
    JButton stop;
    long x;


    public Program() {

        frame = new JFrame("Überlast your PC");
        panel = new JPanel();
        title = new JTextField("Überlast your PC v1.0");
        start = new JButton("Start");
        stop = new JButton("Stop");
        x = 1;
        exit = false;

        stop.addActionListener(new ActionListener () {
            public void actionPerformed(ActionEvent e) {

            exit = true;

        }});

        start.addActionListener(new ActionListener () {
            public void actionPerformed(ActionEvent e) {

            panel.remove(start);
            panel.add(stop);
            frame.repaint();
            frame.revalidate();
            start.setForeground(Color.red);
            while(x <= 9223372036854775807L) {

                System.out.println(x * x);
                x++;

                if (exit = true) {                    
                    break;                        
                }                    
            }

        }});

        frame.add(panel);
        panel.add(title);
        panel.add(start);
        frame.setVisible(true);
        frame.setSize(150,100);
        title.setEditable(false);
        start.setForeground(Color.green);
        stop.setForeground(Color.red);

    }

}

Answer 1

 if(exit = true) {
      break;
 }

应该

 if(exit == true) {
      break;
  }

甚至更简单,只需使用

 if(exit){
   break;
 }

exit=true为exit 指定true,因此if条件为true,因此它会突破循环.

正如@jlordo指出的那样,即使在修复错误之后它也是一个无限循环.