JFrame中显示多个进度条的方法

最新推荐文章于 2023-01-31 19:57:38 发布

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本文介绍了一个使用Java Swing和多线程技术实现的进度条示例。该示例展示了如何在一个JFrame窗口中通过按钮触发不同的线程更新进度条，并在进度完成后显示消息对话框。

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当我们在JFrame中存在多个JProcessBar，每个按钮事件启动一个JProcessBar,当单击某个按钮的时候，运行其中一个进度条，往往位出现程序等待的情况，利用多线程技术可以很好的解决这些问题。。。

利用内部类来访问外部类的属性，

具体代码如下

/* * To change this template, choose Tools | Templates * and open the template in the editor. */ /* * NewJFrame1.java * * Created on 2009-7-28, 17:41:31 */ package desktopapplication1.resources; import java.util.logging.Level; import java.util.logging.Logger; /** * * @author Administrator */ public class NewJFrame1 extends javax.swing.JFrame{ /** Creates new form NewJFrame1 */ public NewJFrame1() { initComponents(); } /** 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(); jButton2 = new javax.swing.JButton(); jTextField1 = new javax.swing.JTextField(); jProgressBar1 = new javax.swing.JProgressBar(); jProgressBar2 = new javax.swing.JProgressBar(); jButton3 = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); jButton1.setText("jButton1"); jButton1.setName("jButton1"); // NOI18N jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jButton2.setText("jButton2"); jButton2.setName("jButton2"); // NOI18N jTextField1.setText("jTextField1"); jTextField1.setName("jTextField1"); // NOI18N jTextField1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jTextField1ActionPerformed(evt); } }); jTextField1.addKeyListener(new java.awt.event.KeyAdapter() { public void keyPressed(java.awt.event.KeyEvent evt) { ab(evt); } }); jProgressBar1.setName("jProgressBar1"); // NOI18N jProgressBar1.addPropertyChangeListener(new java.beans.PropertyChangeListener() { public void propertyChange(java.beans.PropertyChangeEvent evt) { jProgressBar1PropertyChange(evt); } }); jProgressBar2.setName("jProgressBar2"); // NOI18N jButton3.setText("jButton3"); jButton3.setName("jButton3"); // NOI18N 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() .addContainerGap(59, Short.MAX_VALUE) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(layout.createSequentialGroup() .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jProgressBar2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED))) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup() .addGap(60, 60, 60) .addComponent(jButton2) .addGap(54, 54, 54)) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButton1) .addGap(33, 33, 33)) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) .addComponent(jButton3) .addGap(46, 46, 46)))) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(34, 34, 34) .addComponent(jButton2)) .addGroup(layout.createSequentialGroup() .addGap(45, 45, 45) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 65, Short.MAX_VALUE) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jButton1) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 19, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(36, 36, 36) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jProgressBar2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jButton3)) .addGap(87, 87, 87)) ); pack(); }// </editor-fold> int leng=0; boolean a=false; private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: ProcessBar1 t=new ProcessBar1(this); t.start(); jProgressBar1.setVisible(true); this.jButton1.setEnabled(false); } private void ab(java.awt.event.KeyEvent evt) { System.out.println(evt.getKeyChar()); // TODO add your handling code here: } private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: } private void jProgressBar1PropertyChange(java.beans.PropertyChangeEvent evt) { // TODO add your handling code here: javax.swing.JProgressBar bar = (javax.swing.JProgressBar)evt.getSource(); } private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: ProcessBar2 p = new ProcessBar2(this); p.start(); } class ProcessBar2 extends Thread { javax.swing.JFrame j =null; ProcessBar2(javax.swing.JFrame jframe) { j = jframe; } @Override public void run() { int i=0; while(true){ try { while(true) { jProgressBar2.setValue(DB.getComplete(4, DB.getCon())); java.lang.Thread.sleep(2000); if(jProgressBar2.getPercentComplete()==1.0) { System.out.println("Complete"); jProgressBar2.setVisible(false); javax.swing.JOptionPane.showMessageDialog(j,"UserID=1" , "Rejudge Sucess", javax.swing.JOptionPane.INFORMATION_MESSAGE); break; } int a = (int) (jProgressBar2.getPercentComplete() * 100); jButton3.setText("完成"+a+"%"); } jButton3.setText("Rejudge"); jButton3.setEnabled(true); jProgressBar2.setVisible(false); break; } catch (InterruptedException ex) { Logger.getLogger(NewJFrame1.class.getName()).log(Level.SEVERE, null, ex); } } } } /** * @param args the command line arguments */ public static void main() { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { NewJFrame1 nej = new NewJFrame1(); nej.jProgressBar1.setVisible(false); nej.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.JProgressBar jProgressBar1; private javax.swing.JProgressBar jProgressBar2; private javax.swing.JTextField jTextField1; // End of variables declaration //定义内部类，ProcessBar,@para JFrame class ProcessBar1 extends Thread { javax.swing.JFrame j =null; ProcessBar1(javax.swing.JFrame jframe) { j = jframe; } @Override public void run() { int i=0; while(true){ try { while(true) { jProgressBar1.setValue(DB.getComplete(9, DB.getCon())); java.lang.Thread.sleep(2000); if(jProgressBar1.getPercentComplete()==1.0) { System.out.println("Complete"); jProgressBar1.setVisible(false); javax.swing.JOptionPane.showMessageDialog(j,"UserID=1" , "Rejudge Sucess", javax.swing.JOptionPane.INFORMATION_MESSAGE); break; } int a = (int) (jProgressBar1.getPercentComplete() * 100); jButton1.setText("完成"+a+"%"); } jButton1.setText("Rejudge"); jButton1.setEnabled(true); jProgressBar1.setVisible(false); System.out.println(i); break; } catch (InterruptedException ex) { Logger.getLogger(NewJFrame1.class.getName()).log(Level.SEVERE, null, ex); } } } } }