如果您不想替換用戶選擇的Look&感覺,你可以用一個派生自

BasicProgressBarUI的UI代表來代替.

import java.awt.Color;

import java.awt.EventQueue;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.RenderingHints;

import javax.swing.JComponent;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JProgressBar;

import javax.swing.plaf.basic.BasicProgressBarUI;

/** @see https://stackoverflow.com/questions/8884297 */

public class ProgressBarUITest extends JPanel {

public ProgressBarUITest() {

JProgressBar jpb = new JProgressBar();

jpb.setUI(new MyProgressUI());

jpb.setForeground(Color.blue);

jpb.setIndeterminate(true);

this.add(jpb);

}

private static class MyProgressUI extends BasicProgressBarUI {

private Rectangle r = new Rectangle();

@Override

protected void paintIndeterminate(Graphics g,JComponent c) {

Graphics2D g2d = (Graphics2D) g;

g2d.setRenderingHint(

RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

r = getBox(r);

g.setColor(progressBar.getForeground());

g.fillOval(r.x,r.y,r.width,r.height);

}

}

private void display() {

JFrame f = new JFrame("ProgressBarUITest");

f.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);

f.add(this);

f.pack();

f.setLocationRelativeTo(null);

f.setVisible(true);

}

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

@Override

public void run() {

new ProgressBarUITest().display();

}

});

}

}

總結

以上是生活随笔為你收集整理的Java渐变进度条_很好看的java进度条的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。