Java进度条JProgressBar使用方法
package swimg;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
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 ProgressBar implements ActionListener,ChangeListener {
JFrame frame=null;
JProgressBar progressbar;
JLabel label;
Timer timer;
JButton b;
public ProgressBar(){
frame=new JFrame("安装");
frame.setBounds(100, 100, 400, 130);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPanel=frame.getContentPane();
label=new JLabel("",JLabel.CENTER);
progressbar = new JProgressBar();
progressbar.setOrientation(JProgressBar.HORIZONTAL);
progressbar.setMinimum(0);
progressbar.setMaximum(100);
progressbar.setValue(0);
progressbar.setStringPainted(true);
progressbar.addChangeListener(this);
progressbar.setPreferredSize(new Dimension(300,20));
progressbar.setBorderPainted(true);
progressbar.setBackground(Color.pink);
JPanel panel=new JPanel();
b=new JButton("安装");
b.setForeground(Color.blue);
b.addActionListener(this);
panel.add(b);
timer=new Timer(100,this);
contentPanel.add(panel,BorderLayout.NORTH);
contentPanel.add(progressbar,BorderLayout.CENTER);
contentPanel.add(label,BorderLayout.SOUTH);
//frame.pack();
frame.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
if(e.getSource()==b){
timer.start();
}
if(e.getSource()==timer){
int value=progressbar.getValue();
if(value<100)
progressbar.setValue(++value);
else{
timer.stop();
frame.dispose();
}
}
}
public void stateChanged(ChangeEvent e1) {
int value=progressbar.getValue();
if(e1.getSource()==progressbar){
label.setText("目前已完成进度："+Integer.toString(value)+"%");
label.setForeground(Color.blue);
}
}
public static void main(String[] args) {
ProgressBar app=new ProgressBar();
}
}
