progressbarexam.java

来自「Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程」· Java 代码 · 共 36 行

import javax.swing.*;
public class progressBarExam {
  public static void main(String args[]){
    int min=0,max=100;
    JProgressBar jprog=new JProgressBar();
    jprog.setStringPainted(true);
    jprog.setMinimum(min);
    jprog.setMaximum(max);
    jprog.setValue(min);
    JPanel jpanel=new JPanel();
    jpanel.add(jprog);
    JFrame f=new JFrame("进度条");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.getContentPane().add(jpanel);
    f.setBounds(0,0,200,90);
    f.setVisible(true);
    double finish=0.0;
    try{
      for(int i=min;i<=max;i++){
        Thread.sleep(500);
        jprog.setValue(i);
        finish=jprog.getPercentComplete();
        if(finish>=0.48&&finish<=0.52)
        	jprog.setString("已完成50%");
        else if(finish>=0.53&&finish<=0.99)
        	jprog.setString("^_^："+(jprog.getValue()*100/(max-min)+"%"));
        else if(finish==1.0)
        	jprog.setString("已完成100%");
      }
    }
    catch(InterruptedException e){
      System.out.println("错误！");
    }
  }
}