Java面向对象程序设计第八章全部例题代码,可使用Idea导入

import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; public class ShowState extends JFrame implements ActionListener, Runnable{ JTextArea ta; JButton button_start,button_interrupt,button_terminate; JTextField text_state; JLabel label; Thread t; public ShowState(){ super("演示线程状态"); this.setSize(450,300); this.setLocation(200,200); this.setDefaultCloseOperation(EXIT_ON_CLOSE); ta=new JTextArea(); ta.setAutoscrolls(true); this.add(ta); button_start=new JButton("启动"); button_start.addActionListener(this); button_interrupt=new JButton("中断"); button_interrupt.addActionListener(this); button_terminate=new JButton("线程结束后"); button_terminate.addActionListener(this); button_terminate.setEnabled(false); button_interrupt.setEnabled(false); t=new Thread(this); //创建线程对象,目标对象是当前对象 label=new JLabel("线程状态:"); text_state=new JTextField("u"+t.getState(),10); text_state.setEditable(false); JPanel panel=new JPanel(); panel.setLayout(new FlowLayout(0)); panel.add(button_start); panel.add(button_interrupt); panel.add(button_terminate); panel.add(label); panel.add(text_state); this.add(panel,BorderLayout.SOUTH); this.setVisible(true); } public static void main(String args[]){ new ShowState(); } public void actionPerformed(ActionEvent e){ //TODO自动生成方法存根 if(e.getSource()==button_start){ //单击启动按钮时 t=new Thread(this); //重新创建一个线程对象 t.start(); text_state.setText("…"+t.getState()); //显示线程状态 button_start.setEnabled(false); button_interrupt.setEnabled(true); } if(e.getSource()==button_interrupt){ //单击中断按钮时 t.interrupt(); //对线程设置中断标记 text_state.setText("“+t.getState()); button_start.setEnabled(true); button_terminate.setEnabled(true); button_interrupt.setEnabled(false); } if(e.getSource()==button_terminate){ //单击·线程终止后·按钮时,显示线程终止后的状态 text_state.setText("™"+t.getState()); } } public void run(){ //TODO自动生成方法存根 int i=1; while(t.isAlive()&&!t.isInterrupted()){ //线程活动且没有中断 String str="a"; if(i%20==0) str+="\n"; i++; ta.append(str); try{ t.sleep(100); }catch(InterruptedException e){ //TODO自动生成catch块 break; //退出循环 } } } //run()方法的执行结束,线程对象终止 }