测试代码，解决java gui swing多线程界面假死、僵死问题，实现界面动态刷新，动态同步更新数据

男娘i 2022-07-21 05:52 191阅读 0赞

**（原创）**

测试代码，解决java gui swing多线程界面假死、僵死问题，实现界面动态刷新，动态更新，同步显示数据

**主类：**

**package testguimulitiplethread;**

**/\*\*  
\*  
\* @author Administrator  
\*/  
public class Main \{**

**    /\*\*  
     \* @param args the command line arguments  
     \*/  
    public static void main(String\[\] args) \{  
       NewJFrame nf =new NewJFrame();  
    \}**

**\}**

**线程类：**

**package testguimulitiplethread;**

**/\*\*  
\*  
\* @author Administrator  
\*/  
public class TestThread extends Thread\{**

**    NewJFrame nf;  
    @Override  
    public void run() \{  
//在Count中暂停线程即可，无需在run()中暂停线程。  
/\*while(true)\{  
    if(nf.getFlag()==1)\{  
   try \{  
      Thread.sleep(1000);  
   \} catch (InterruptedException ex) \{  
     //  
   \}  
    \}\*/   
//   else\{  
   Count.testCount(nf);  
   //执行计算完毕后跳出，线程结束。  
   nf.setFlag(-1);  
// break;  
//   \}  
//\}  
  
    \}**

**\}**

**计算任务类：**

**package testguimulitiplethread;**

**/\*\*  
\*  
\* @author Administrator  
\*/  
public class Count \{  
    static int c = 10000;  
    public static void testCount(NewJFrame nf)\{  
for(int i=0;i<c;i++)\{  
       
     //先考虑暂停情况：  
     while(nf.getFlag()==1)\{//sleep():暂停，循环暂停。  
      try \{  
    Thread.sleep(1000);  
      \} catch (InterruptedException ex) \{  
        //  
      \}  
   \}  
     //再考虑跳出情况：  
     if(nf.getFlag()==-1)\{  
      break;  
     \}  
     //最后才输出：  
     System.out.println(i);  
     nf.getJLabel1().setText(String.valueOf(i));///  
       
   //未未优化前的代码：   
   /\* if(nf.getFlag()==0)\{  
     System.out.println(i);  
     nf.getJLabel1().setText(String.valueOf(i));///  
     \}  
     else\{  
   if(nf.getFlag()==-1)\{  
      break;  
   \}  
   while(nf.getFlag()==1)\{//sleep():暂停，循环暂停。  
      try \{  
    Thread.sleep(1000);  
      \} catch (InterruptedException ex) \{  
        //  
      \}  
   \}  
   //别漏了输出：  
     System.out.println(i);  
     nf.getJLabel1().setText(String.valueOf(i));///  
     \}\*/  
       
\}  
    \}  
    public static void testCount()\{  
  
    \}  
\}**

**界面显示类：（注：界面是用netbeans6.1里的JFrame类选项来创建的）**

**/\*  
\* NewJFrame.java  
\*  
\* Created on 2010年4月24日, 上午11:25  
\*/**

**package testguimulitiplethread;**

/\*\*  
\*  
\* @author Administrator  
\*/  
public class NewJFrame extends javax.swing.JFrame \{

private int flag = -1;//-1:未启动，0：启动，1：暂停  
   TestThread   t ;  
    /\*\* Creates new form NewJFrame \*/  
    public NewJFrame() \{  
        initComponents();  
this.setVisible(true);  
    \}

/\*\* This method is called 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 void initComponents() \{

jButton1 = new javax.swing.JButton();  
        jLabel1 = new javax.swing.JLabel();  
        jButton2 = new javax.swing.JButton();  
        jButton3 = new javax.swing.JButton();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT\_ON\_CLOSE);

jButton1.setText("开始");  
        jButton1.addActionListener(new java.awt.event.ActionListener() \{  
            public void actionPerformed(java.awt.event.ActionEvent evt) \{  
                jButton1ActionPerformed(evt);  
            \}  
        \});

jLabel1.setText("空");

jButton2.setText("暂停");  
        jButton2.addActionListener(new java.awt.event.ActionListener() \{  
            public void actionPerformed(java.awt.event.ActionEvent evt) \{  
                jButton2ActionPerformed(evt);  
            \}  
        \});

jButton3.setText("结束");  
        jButton3.addActionListener(new java.awt.event.ActionListener() \{  
            public void actionPerformed(java.awt.event.ActionEvent evt) \{  
                jButton3ActionPerformed(evt);  
            \}  
        \});

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());  
        getContentPane().setLayout(layout);  
        layout.setHorizontalGroup(  
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)  
            .addGroup(layout.createSequentialGroup()  
                .addGap(96, 96, 96)  
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)  
                    .addGroup(layout.createSequentialGroup()  
                        .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT\_SIZE, 156, Short.MAX\_VALUE)  
                        .addGap(18, 18, 18))  
                    .addGroup(layout.createSequentialGroup()  
                        .addComponent(jButton1)  
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 32, Short.MAX\_VALUE)  
                        .addComponent(jButton2)  
                        .addGap(28, 28, 28)))  
                .addComponent(jButton3)  
                .addContainerGap(73, Short.MAX\_VALUE))  
        );  
        layout.setVerticalGroup(  
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)  
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()  
                .addGap(34, 34, 34)  
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED\_SIZE, 77, javax.swing.GroupLayout.PREFERRED\_SIZE)  
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 83, Short.MAX\_VALUE)  
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)  
                    .addComponent(jButton1)  
                    .addComponent(jButton3)  
                    .addComponent(jButton2))  
                .addGap(83, 83, 83))  
        );

pack();  
    \}// </editor-fold>

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) \{  
//由于程序比较简单，所以提供了暂停功能。而且，在该程序中计算比较简单，所以在计算中暂停依旧可以保持线程安全。  
//但对于复杂计算是不是也能提供暂停功能呢？疑惑中……复杂计算的流程多，循环跳转也多，要在暂停的同时保证线程安全难道要把整个程序暂停？      
if(flag==-1)\{  
    flag=0;  
    jButton1.setEnabled(false);  
    jButton1.setText("继续");  
    t   =   new   TestThread();  
    t.nf = this;  
          t.start()   ;     
\}  
if(flag==1)\{  
     flag=0;  
\}  
  
\}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) \{  
    if(flag==0)\{  
flag=1;  
jButton1.setEnabled(true);  
    \}  
\}

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) \{  
flag = -1;  
jLabel1.setText("空");  
jButton1.setEnabled(true);  
jButton1.setText("开始");  
\}

/\*\*  
    \* @param args the command line arguments  
    \*/  
    public static void main(String args\[\]) \{  
        java.awt.EventQueue.invokeLater(new Runnable() \{  
            public void run() \{  
                new NewJFrame().setVisible(true);  
            \}  
        \});  
    \}

// Variables declaration - do not modify  
    private javax.swing.JButton jButton1;  
    private javax.swing.JButton jButton2;  
    private javax.swing.JButton jButton3;  
    private javax.swing.JLabel jLabel1;  
    // End of variables declaration

public javax.swing.JButton getJButton1() \{  
return jButton1;  
    \}

public javax.swing.JButton getJButton2() \{  
return jButton2;  
    \}

public javax.swing.JLabel getJLabel1() \{  
return jLabel1;  
    \}

public int getFlag() \{  
return flag;  
    \}

public void setFlag(int flag) \{  
this.flag = flag;  
    \}

\-------------------------------------------------------------------------

代码都在上面了，大家注意看注释~~~~~~~~~![j_0018.gif][]

水平有限，望大家不吝赐教~~~~~~~~~~~~~~![j_0007.gif][]

今天中午没吃饭，囧~~~~~~~~~~~~~~~~~~~![B_0004.gif][]

今天天气不错，外面的小鸟叫了N天了，也不累~![i_f29.gif][]

转载请注明出处，伸手党自重~~~~~~~~~~~~~![C_0007.gif][]

收藏于 2010-04-24

[j_0018.gif]: /images/20220720/21f06c6550bb433fb7fa70cde6036f18.png
[j_0007.gif]: /images/20220720/8d1b38bec12f44e1952cd181fec35b4b.png
[B_0004.gif]: /images/20220720/998a5229a51246919e995a51202c6360.png
[i_f29.gif]: /images/20220720/9551bce5b4294a869452bb1aba266a51.png
[C_0007.gif]: /images/20220720/f56a9e84cd18448b821d54db10f00442.png