JProgressBar进度条

来源：互联网发布：仁化网络问政2017 编辑：程序博客网时间：2024/06/05 20:38
核心在于线程操作
//source codeimport javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JProgressBar;import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener ;class ProcessBar extends Thread  {    private int DELAY = 100 ;    private JProgressBar  bar  ;    private JButton button ;    private boolean flag = true ;    public ProcessBar(JProgressBar bar,JButton button)  {        this.bar = bar ;        this.button = button ;              }       public void run()  {        button.setEnabled(false);        int max = bar.getMaximum() ;        while(flag)  {            try  {                Thread.sleep(DELAY);   //休眠100毫秒            } catch(InterruptedException ignoreException)  {                           }            bar.setValue(bar.getValue()+1);            if(bar.getValue() >= max)  {                flag = false ;            }        }         button.setEnabled(true);    }} ;class Tester  {    public static void main(String args[])  {        final JProgressBar pbar = new JProgressBar(0,100) ;        pbar.setStringPainted(true);        final JButton bstart = new JButton("开始") ;        bstart.addActionListener(new ActionListener()  {            public void actionPerformed(ActionEvent e)  {                if (pbar.getValue() >= pbar.getMaximum())  {                    pbar.setValue(0) ;                }                Thread stepper = new ProcessBar(pbar, bstart) ;                stepper.start() ;            }        });               JFrame frame  = new JFrame("安装进度") ;        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.add(pbar,BorderLayout.NORTH) ;        frame.add(bstart,BorderLayout.SOUTH) ;        frame.setSize(300,100);        frame.setVisible(true) ;    }}
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