Question

如何用JAVA Swing 做出 登陆界面时的 进度条？

最近做JAVA Swing项目 想做个登陆时的 一个进度条 有谁知道用JAVA Swing怎么才能做出来啊？

Answer 1

//给你个例子吧

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.reflect.*;

public class ProgressSample {

static class BarThread extends Thread {
private static int DELAY = 500;
JProgressBar progressBar;

public BarThread(JProgressBar bar) {
progressBar = bar;
}

public void run() {
int minimum = progressBar.getMinimum();
int maximum = progressBar.getMaximum();
Runnable runner = new Runnable() {
public void run() {
int value = progressBar.getValue();
progressBar.setValue(value+1);
}
};
for (int i=minimum; i<maximum; i++) {
try {
SwingUtilities.invokeAndWait(runner);
// Our task for each step is to just sleep
Thread.sleep(DELAY);
} catch (InterruptedException ignoredException) {
} catch (InvocationTargetException ignoredException) {
}
}
}
}

public static void main(String args[]) {
// Initialize
final JProgressBar aJProgressBar = new JProgressBar(0, 100);
final JButton aJButton = new JButton("Start");

aJProgressBar.setStringPainted(true); // 显示百分比字符
aJProgressBar.setIndeterminate(false); // 不确定的进度条

ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
aJButton.setEnabled(false);
Thread stepper = new BarThread(aJProgressBar);
stepper.start();
}
};

aJButton.addActionListener(actionListener);

JFrame theFrame = new JFrame("Progress Bars");
theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container contentPane = theFrame.getContentPane();
contentPane.setLayout(new GridLayout(2,1));
contentPane.add(aJProgressBar);
contentPane.add(aJButton);
theFrame.setSize(300, 100);
theFrame.setVisible(true);
}
}