线程小例子--控制输出

线程小例子--控制输出

功能：一个小窗体，两个按钮，点击开始按钮，控制台开始打印，点击停止按钮，控制台停止打印。

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class ThreadDemo extends JFrame{
    String info="你很棒";
    static Thread tstart;
    Boolean iscontinue=true;  //控制开始还是结束
    public  ThreadDemo(){
        super();
        Container c=getContentPane();
        setBounds(300,200,250,100);
        c.setLayout(new FlowLayout());
        JButton jb1=new JButton("开始");
        JButton jb2=new JButton("停止");
        c.add(jb1);
        c.add(jb2);
        jb1.addActionListener(new ActionListener() {  //开始按钮的监听事件
            
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                tstart=new Thread(new Runnable() {
                    
                    @Override
                    public void run() {
                        // TODO Auto-generated method stub
                        iscontinue=true;
                        while(true){
                            if(iscontinue==false){
                                break;
                            }
                            try {
                                Thread.sleep(1000);
                            } catch (InterruptedException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }
                            System.out.println(info);
                        }
                    }
                });
                tstart.start();
            }
        });
        jb2.addActionListener(new ActionListener() {  //结束按钮的监听事件
            
            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                iscontinue=false;
                tstart=null;
            }
        });
        setVisible(true);
    }
    public static void main(String[] args){
        new ThreadDemo();
    }
}

思路：在开始按钮中新建线程，将控制变量iscontinue置为true，在结束按钮中将控制变量iscontinue置为false，同时将线程置为null