（原創）

測試程式碼，解決java gui swing多執行緒介面假死、僵死問題，實現介面動態重新整理，動態更新，同步顯示資料

主類：

package testguimulitiplethread;

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

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

}

執行緒類：

package testguimulitiplethread;

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

    NewJFrame nf;
    @Override
    public void run() {
//在Count中暫停執行緒即可，無需在run()中暫停執行緒。
/*while(true){
    if(nf.getFlag()==1){
   try {
      Thread.sleep(1000);
   } catch (InterruptedException ex) {
     //
   }
    }*/ 
//   else{
   Count.testCount(nf);
   //執行計算完畢後跳出，執行緒結束。
   nf.setFlag(-1);
// break;
//   }
//}

    }

}

計算任務類：

package testguimulitiplethread;

/**
*
* @author Administrator
*/
public class Count {
    static int c = 10000;
    public static void testCount(NewJFrame nf){
for(int i=0;i<c;i++){
     
     //先考慮暫停情況：
     while(nf.getFlag()==1){//sleep():暫停，迴圈暫停。
      try {
    Thread.sleep(1000);
      } catch (InterruptedException ex) {
        //
      }
   }
     //再考慮跳出情況：
     if(nf.getFlag()==-1){
      break;
     }
     //最後才輸出：
     System.out.println(i);
     nf.getJLabel1().setText(String.valueOf(i));///
     
   //未未優化前的程式碼： 
   /* 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():暫停，迴圈暫停。
      try {
    Thread.sleep(1000);
      } catch (InterruptedException ex) {
        //
      }
   }
   //別漏了輸出：
     System.out.println(i);
     nf.getJLabel1().setText(String.valueOf(i));///
     }*/
     
}
    }
    public static void testCount(){

    }
}

介面顯示類：（注：介面是用netbeans6.1裡的JFrame類選項來建立的）

/*
* 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:未啟動，0：啟動，1：暫停
   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("開始");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jLabel1.setText("空");

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

        jButton3.setText("結束");
        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) {
//由於程式比較簡單，所以提供了暫停功能。而且，在該程式中計算比較簡單，所以在計算中暫停依舊可以保持執行緒安全。
//但對於複雜計算是不是也能提供暫停功能呢？疑惑中……複雜計算的流程多，迴圈跳轉也多，要在暫停的同時保證執行緒安全難道要把整個程式暫停？    
if(flag==-1){
    flag=0;
    jButton1.setEnabled(false);
    jButton1.setText("繼續");
    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("開始");
}

    /**
    * @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;
    }

}

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程式碼都在上面了，大家注意看註釋~~~~~~~~~

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