更改JButton渐变颜色，但仅适用于一个按钮，而不是全部

问题描述

限时删除！！

我想更改 JButton 渐​​变色，
i找到这个，，但我想更改渐变只有一个按钮，而不是所有按钮

I want to change JButton gradient color,i found this, http://java2everyone.blogspot.com/2009/01/set-jbutton-gradient-color.html, but i want to change gradient for only one button, not all button

推荐答案

您可以覆盖方法实例并绘制其具有以下类之一的对象实现界面：

You can override the paintComponent method of the JButton instance and paint its Graphics object with one of the following classes that implement the Paint interface:

• 。

• GradientPaint.
• LinearGradientPaint
• MultipleGradientPaint
• RadialGradientPaint

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public final class JGradientButtonDemo {
    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private static void createAndShowGUI() {
        final JFrame frame = new JFrame("Gradient JButton Demo");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().setLayout(new FlowLayout());
        frame.add(JGradientButton.newInstance());
        frame.setSize(new Dimension(300, 150)); // used for demonstration
        //frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private static class JGradientButton extends JButton {
        private JGradientButton() {
            super("Gradient Button");
            setContentAreaFilled(false);
            setFocusPainted(false); // used for demonstration
        }

        @Override
        protected void paintComponent(Graphics g) {
            final Graphics2D g2 = (Graphics2D) g.create();
            g2.setPaint(new GradientPaint(
                    new Point(0, 0),
                    Color.WHITE,
                    new Point(0, getHeight()),
                    Color.PINK.darker()));
            g2.fillRect(0, 0, getWidth(), getHeight());
            g2.dispose();

            super.paintComponent(g);
        }

        public static JGradientButton newInstance() {
            return new JGradientButton();
        }
    }
}

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