一个GUI和线程的基本问题

[quansheng3510]

我今天写了个程序，实现的功能是在JTEXTFIELD中连续显示顺序数字,但是我写了好久，功能却始终不能实现,调试很久也不行,求助
import java.awt.BorderLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

class ThreadTest1 extends JFrame {
JTextField l;

private static int count = 0;

private Test12 m;

public ThreadTest1() {
super();
this.setSize(300, 400);
this.setLayout(new BorderLayout());
JPanel m1 = new JPanel();
l = new JTextField(10);
l.addActionListener(new Thread1());
m = new Test12(l);
m1.add(l, BorderLayout.SOUTH);
this.add(m1);
}

class Thread1 implements ActionListener {

public void actionPerformed(ActionEvent e) {
m = new Test12(l);
m.start();
}
}
}

public class ThreadTest {
public static void main(String[] args) {
ThreadTest1 l = new ThreadTest1();
l.setVisible(true);
}
}
------------------------------------------------------------------------
import javax.swing.JTextField;

public class Test12 extends Thread {
private JTextField m;
private static int count=0;
public Test12(JTextField k)
{
this.m=k;
}
public void run()
{
try{
m.setText(Integer.toString(count));
count = count + 1;
Thread.sleep(3000);

}
catch(Exception e)
{
e.printStackTrace();
}
}
}

[awusoft]

public void run()
{

try{
while(true)
{

m.setText(Integer.toString(count));
count = count + 1;
Thread.sleep(3000);
}
}
catch(Exception e)
{
e.printStackTrace();
}

[quansheng3510]

不可以哦，应该不是这里的问题,

[awusoft]

import java.awt.BorderLayout; 
import java.awt.TextField; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 

class ThreadTest1 extends JFrame { 
	JTextField l; 

	private static int count = 0; 

	private Test12 m; 

	public ThreadTest1() { 
		super(); 
		this.setSize(300, 400); 
		this.setLayout(new BorderLayout()); 
		JPanel m1 = new JPanel(); 
		l = new JTextField(10); 
		l.addActionListener(new Thread1()); 
		m = new Test12(l); 
		m1.add(l, BorderLayout.SOUTH); 
		this.add(m1); 
	} 

	class Thread1 implements ActionListener { 

		public void actionPerformed(ActionEvent e) { 
			if(m!=null)
			{
				//m = new Test12(l); 
				m.start();
			}else
			{
				m = new Test12(l); 
				m.start();
			}
		} 
	} 
} 




import javax.swing.JFrame;

public class ThreadTest { 
	public static void main(String[] args) { 
		ThreadTest1 l = new ThreadTest1(); 
		l.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		l.setVisible(true); 
	} 
} 




import javax.swing.JTextField; 

public class Test12 extends Thread { 
	private JTextField m; 
	private static int count=0; 
	public Test12(JTextField k) 
	{ 
		this.m=k; 
	} 
	public void run() 
	{ 
		try{ 
			while(true)
			{
				m.setText(Integer.toString(count)); 
				count = count + 1; 
				Thread.sleep(3000);
			}

		} 
		catch(Exception e) 
		{ 
			e.printStackTrace(); 
		} 
	} 
} 

[awusoft]

按多次回车的话会报错.

[quansheng3510]

我改了下,终于可以了，也不知道是那里的问题，但是原始程序并没有错,不过还是谢谢了

import java.awt.FlowLayout;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

class ThreadTest1 extends JFrame {
	JTextField l;

	Button m2;

	private static int count = 0;

	private Test12 m;

	public ThreadTest1() {
		super();
		this.setSize(300, 400);
		this.setLayout(new BorderLayout());
		m2 = new Button("Start");
		JPanel m1 = new JPanel();
		l = new JTextField(10);
		m2.addActionListener(new Thread1());
		m1.add(l, BorderLayout.SOUTH);
		m1.add(m2, FlowLayout.LEFT);
		this.add(m1);
	}

	class Thread1 implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			m = new Test12(m2, l);
			m.start();
		}
	}
}

public class ThreadTest {
	public static void main(String[] args) {
		ThreadTest1 l = new ThreadTest1();
		l.setVisible(true);
	}
}
import javax.swing.JFrame;

public class ThreadTest { 
    public static void main(String[] args) { 
        ThreadTest1 l = new ThreadTest1(); 
        l.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        l.setVisible(true); 
    } 
} 




import javax.swing.JTextField; 

public class Test12 extends Thread { 
    private JTextField m; 
    private static int count=0; 
    public Test12(JTextField k) 
    { 
        this.m=k; 
    } 
    public void run() 
    { 
        try{ 
            while(true)
            {
                m.setText(Integer.toString(count)); 
                count = count + 1; 
                Thread.sleep(3000);
            }

        } 
        catch(Exception e) 
        { 
            e.printStackTrace(); 
        } 
    } 
}