java进度条

最新推荐文章于 2023-01-31 19:57:38 发布

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最新推荐文章于 2023-01-31 19:57:38 发布

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分类专栏： java基础文章标签：进度条 javase java学习 java基础 java

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package com.cn;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.Timer;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Jindutiao {
	
	static JFrame jf;
	static JLabel jl;
	static JButton jb;
	static Timer timer;
	static JProgressBar jpb;
	public static void main(String[] args) {
		jf=new JFrame("进度条");
		JPanel jp=new JPanel();
		jl=new JLabel("",JLabel.CENTER);
		jpb=new JProgressBar();
		jpb.setMinimum(0);
		jpb.setMaximum(100);
		jpb.setValue(0);
		jpb.setStringPainted(true);
		jpb.setPreferredSize(new Dimension(300,30));
		jpb.addChangeListener(new ChangeListener() {
			
			@Override
			public void stateChanged(ChangeEvent e) {
				jl.setText("目前进度:"+jpb.getValue()+"%");	
			}
		});
		jb=new JButton("start");
		jb.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				timer.start();
			}
		});
		timer =new Timer(50, new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				int v=jpb.getValue();
				if (e.getSource()==timer){
					if (v<100){
						jpb.setValue(++v);
					}else{
						timer.stop();
						jpb.setValue(0);
					}
				}
				
			}
		});
		jp.add(jb);
		jf.add(jp,BorderLayout.NORTH);
		jf.add(jpb,BorderLayout.CENTER);
		jf.add(jl,BorderLayout.SOUTH);
		jf.setBounds(300, 200, 200, 150);
		jf.setVisible(true);

	}

}

效果图如下：