多线程和标准输入输出流

1、实 验 报 告（ 2015/ 2016 学年 第1学期）课程名称JAVA语言程序设计实验名称多线程程序设计实验时间2015年 12 月 1日指导单位软件工程系指导教师 学院(系)专 业学生姓名班级学号实验名称多线程程序设计指导教师杨健实验类型验证实验学时2实验时间2015/12/1一、 实验目的（1） 掌握Java中创建线程对象的方法。（2） 熟悉控制线程状态的过程。（3） 熟悉线程同步机制。（4） 学会用多线程创建多任务的程序设计方法。二、实验环境(实验设备)Eclipse3、 实验内容（1）运行 code1.txt 中的代码，体会通过继承Thread类构造线程的特点。（2）编程完成：要求用

2、实现Runnable接口方式创建三个线程，每个线程的工作是在自己的界面随机的显示26个字母中的一个字母；可通过界面按钮，临时挂起或恢复线程的运行。GUI显示界面参考如下图：GUI参考代码见code2.txt随机显示字母的参考代码见code3.txt实验代码：package 多线程;import javax.swing.*;import java.awt.*;import java.awt.event.ActionEvent;/* * To change this license header, choose License Headers in Project Properties. * To

3、 change this template file, choose Tools | Templates * and open the template in the editor. */import java.awt.event.ActionListener;/* * * author acer */public class NewJFrame extends javax.swing.JFrame /* * Creates new form NewJFrame */ public NewJFrame() initComponents(); /* * This method is called

4、 from within the constructor to initialize the form. * WARNING: Do NOT modify this code. The content of this method is always * regenerated by the Form Editor. */ SuppressWarnings("unchecked") / <editor-fold defaultstate="collapsed" desc="Generated Code"> private

5、void initComponents() jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jLabel3 = new javax.swing.JLabel(); jTextField1 = new javax.swing.JTextField(); jTextField2 = new javax.swing.JTextField(); jTextField3 = new javax.swing.JTextField(); jCheckBox1 = new javax.swing.JCheckBox

6、(); jCheckBox2 = new javax.swing.JCheckBox(); jCheckBox3 = new javax.swing.JCheckBox(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jLabel1.setText("线程1："); jLabel2.setText("线程2："); jLabel3.setText("线程3："); jCheckBox1.setText("线程挂起");

7、jCheckBox2.setText("线程挂起"); jCheckBox3.setText("线程挂起"); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane(); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(la

8、yout.createSequentialGroup() .addGap(36, 36, 36) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup() .addComponent(jLabel3) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT

9、_SIZE, Short.MAX_VALUE) .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(jLabel2) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlaceme

10、nt.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(jLabel1) .addGap(27, 27

11、, 27) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 40, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(67, 67, 67) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jCheckBox1) .addComponent(jCheckBox2) .addComponent(jCheckBox3) .addC

12、ontainerGap(115, Short.MAX_VALUE) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(25, 25, 25) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel1) .ad

13、dComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jCheckBox1) .addGap(28, 28, 28) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel2) .addComp

14、onent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jCheckBox2) .addGap(30, 30, 30) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jLabel3) .addComponent

15、(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jCheckBox3) .addContainerGap(34, Short.MAX_VALUE) ); pack(); / </editor-fold> static class SimpleThread extends Thread public SimpleThread(String st

16、r) super(str);/调用其父类的构造方法 public void run()/重写run方法 for(int i=0;i+) Run(); try sleep(int)(Math.random()*1000); catch (InterruptedException e) / TODO Auto-generated catch blocke.printStackTrace(); public static char suiJi() char suiJi='1' char ziMu='A','B','C','D&#

17、39;,'E','F','G','H','I','J','K','L','M','L','N', 'O','P','Q','R','S','T','U','V','W','X','Y','Z' boolean flag=new bo

18、oleanziMu.length; for(int i=0;i<5;i+) int s; do s=(int)(Math.random()*ziMu.length); while(flags); suiJi=ziMus; flags=true; return suiJi; SuppressWarnings("deprecation")public static void Run() /System.out.println("#"+SimpleThread.currentThread().getName(); if(SimpleThread.curr

19、entThread().getName().equals("线程1")&&!jCheckBox1.isSelected() jTextField1.setText(suiJi()+""); if(SimpleThread.currentThread().getName().equals("线程2")&&!jCheckBox2.isSelected() jTextField2.setText(suiJi()+""); if(SimpleThread.currentThread().ge

20、tName().equals("线程3")&&!jCheckBox3.isSelected() jTextField3.setText(suiJi()+""); /* * param args the command line arguments */ public static void main(String args) /* Set the Nimbus look and feel */ /<editor-fold defaultstate="collapsed" desc=" Look and

21、feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel. * For details see */ try for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels() if ("Nimbus".equals(info.getName

22、() javax.swing.UIManager.setLookAndFeel(info.getClassName(); break; catch (ClassNotFoundException ex) java.util.logging.Logger.getLogger(NewJFrame.class.getName().log(java.util.logging.Level.SEVERE, null, ex); catch (InstantiationException ex) java.util.logging.Logger.getLogger(NewJFrame.class.getNa

23、me().log(java.util.logging.Level.SEVERE, null, ex); catch (IllegalAccessException ex) java.util.logging.Logger.getLogger(NewJFrame.class.getName().log(java.util.logging.Level.SEVERE, null, ex); catch (javax.swing.UnsupportedLookAndFeelException ex) java.util.logging.Logger.getLogger(NewJFrame.class.

24、getName().log(java.util.logging.Level.SEVERE, null, ex); /</editor-fold> /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() public void run() new NewJFrame().setVisible(true); new SimpleThread("线程1").start(); new SimpleThread("线程2").start(); ne

25、w SimpleThread("线程3").start(); ); / Variables declaration - do not modify private static javax.swing.JCheckBox jCheckBox1; private static javax.swing.JCheckBox jCheckBox2; private static javax.swing.JCheckBox jCheckBox3; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel

26、2; private javax.swing.JLabel jLabel3; private static javax.swing.JTextField jTextField1; private static javax.swing.JTextField jTextField2; private static javax.swing.JTextField jTextField3; / End of variables declaration 实验用例测试: 1、如图，当程序运行时，三条线程同时运行，输出字符 2、当线程挂1起时，线程1停止，线程一上输出的字符不变 3、当取消挂起时，线程一继续运行四、实验小结（包括问题和解决方法、心得体会等） 一开始卡在线程挂起和取消挂起上面，最后通过资料的查阅和自己的四高解决了这个问题，也学到了许多，丰富了自己的知识面。五、指导教师评语成 绩批阅人日 期实验名称多线程程序设计指导教师杨健实验类型验证实验学时2实验时间2015/12/1二、 实验目的（1） 通过本实验熟悉输入流、输出流的概念（2） 学会使用标准输入/输出流对标准设备进行输入和输出；使用缓冲流进行文件读写。（3） 学会设置并读取程序运行时的参数。（4） 理解输入/输出操作抛出的编译性异