progressbardemo.java

java经典的源代码 我非常喜欢这个源代码 对于编程很有好处

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ProgressBarDemo extends JFrame{
  public static void main(String args[]){
    int min=0,max=100;
    JProgressBar jProBar=new JProgressBar();
    jProBar.setStringPainted(true);
    jProBar.setMinimum(min);
    jProBar.setMaximum(max);
    jProBar.setValue(min);
    JPanel jP=new JPanel();
    jP.add(jProBar);
    JFrame f=new JFrame("Progress Bar");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(jP);
    f.setBounds(0,0,200,60);
    f.setVisible(true);
    double finish=0.0;
    try{
      for(int i=min;i<=max;i++){
        Thread.sleep(500);
        jProBar.setValue(i);
        finish=jProBar.getPercentComplete();
        if(finish>=0.48&&finish<=0.52)
          jProBar.setString("Have finished half");
        else if(finish>=0.53&&finish<=0.99)
          jProBar.setString("^_^："+(jProBar.getValue()*100/(max-min)+"%"));
        else if(finish==1.0)
          jProBar.setString("Have finished");
      }
    }
    catch(InterruptedException e){
      System.out.println("Error");
    }
  }
}