swing 自定义button

今天的任务做一个button时，在取图片时出错了 。

ImageIcon ImageIcon1 = new ImageIcon("drive.png");会提示找不到图片

ImageIcon ImageIcon1 = new ImageIcon(RButton.class.getResource("drive.png"));就ok了

ImageIcon ImageIcon1 = new ImageIcon("E：/drive.png");也可以

package com.swing.button.a;

/**
 * @(#)RJButton.java  0.1.0  2007-9-11
 */

import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.RoundRectangle2D;

import javax.swing.ImageIcon;
import javax.swing.JButton;

/**
 * Custom JButton
 */
public class RButton extends JButton {
	private static final long serialVersionUID = 39082560987930759L;
	public static final Color BUTTON_COLOR1 = new Color(205, 255, 205);
	public static final Color BUTTON_COLOR2 = new Color(51, 154, 47);
	// public static final Color BUTTON_COLOR1 = new Color(125, 161, 237);
	// public static final Color BUTTON_COLOR2 = new Color(91, 118, 173);
	public static final Color BUTTON_FOREGROUND_COLOR = Color.WHITE;
	private boolean hover;

	@Override
	protected void paintComponent(Graphics g) {

		Graphics2D g2d = (Graphics2D) g.create();
		int h = getHeight();
		int w = getWidth();
		float tran = 0.3F;

		g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
				RenderingHints.VALUE_ANTIALIAS_ON);
		// 抗锯齿提示值——使用抗锯齿模式完成呈现
		// 告诉绘制API我们需要平滑一点，否则绘制出来会有很多锯齿哟。

		g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
				tran));
		// 告诉绘图API我们需要绘制一个有透明度的，tran就是透明度（0-1）

		// RoundRectangle2D，这个就是边角都为圆角的方形
		RoundRectangle2D.Float r2d = new RoundRectangle2D.Float(0, 0, w, h, 5,
				5);
		/*
		 * x - 设置此 RoundRectangle2D 的 X 坐标 y - 设置此 RoundRectangle2D 的 Y 坐标 w -
		 * 设置此 RoundRectangle2D 的宽度 h - 设置此 RoundRectangle2D 的高度 arcWidth - 设置此
		 * RoundRectangle2D 的弧宽 arcHeight - 设置此 RoundRectangle2D 的弧高
		 */

		/* Rectangle2D.Float r2d = new Rectangle2D.Float(0,0,20,20); */
		Shape clip = g2d.getClip();
		g2d.clip(r2d);
		g2d.fillRect(0, 0, w, h);
		g2d.setClip(clip);
		System.out.println(clip.getBounds());
		g2d.drawRoundRect(0, 0, w - 1, h - 1, 5, 5);
		// 画图片
		// g2d.setClip(0,0,w,h);
		Image image = this.getToolkit().createImage("drive.png");
		ImageIcon ImageIcon1 = new ImageIcon(
				RButton.class.getResource("drive.png"));
		g2d.drawImage(ImageIcon1.getImage(), 10, 10, null);

		// 倒三角
		g2d.setClip(w / 2, 0, w, h);
		/*
		 * x - 新剪贴区矩形的 x 坐标。 y - 新剪贴区矩形的 y 坐标。 width - 新剪贴区矩形的宽度。 height -
		 * 新剪贴区矩形的高度。
		 */
		g2d.setColor(Color.black);
		int x1 = (w / 8) * 5;
		int y1 = h / 4;
		int x2 = (w / 8) * 7;
		int y2 = h / 4;
		int x3 = (w / 8) * 6;
		int y3 = (h / 4) * 3;
		g2d.fillPolygon(new int[] { x1, x2, x3 }, new int[] { y1, y2, y3 }, 3);// 三角形
		g2d.dispose();
		super.paintComponent(g);

	}

	public RButton(String icon1) {
		ImageIcon ImageIcon1 = new ImageIcon(RButton.class.getResource(icon1));

		// setLayout(new BorderLayout());
		setFont(new Font("system", Font.PLAIN, 12));
		/*
		 * JLabel j1 = new JLabel(ImageIcon1); j1.setBounds(0, 0, 20, 20);
		 * add(j1,BorderLayout.LINE_START);
		 */

		setBorderPainted(false);// 不绘制边框
		setForeground(BUTTON_COLOR2);
		setFocusPainted(false);
		setContentAreaFilled(false);// 不绘制内容
		addMouseListener(new MouseAdapter() {
			@Override
			public void mouseEntered(MouseEvent e) {
				// setForeground(BUTTON_FOREGROUND_COLOR);
				// setBackground(Color.red);
				setBorderPainted(true);
			
				repaint();
			}

			@Override
			public void mouseExited(MouseEvent e) {
				setForeground(BUTTON_COLOR2);
				setBorderPainted(false);
				repaint();
			}
		});
	}

}

package com.swing.button.a;

import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JPanel;



public class TestButton extends JFrame{

	/**
	 * 
	 */
	private static final long serialVersionUID = -6604974096681305078L;

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		JFrame j = new TestButton();
		JPanel p = new JPanel();
		RButton rb = new RButton("drive.png");
		rb.setPreferredSize(new Dimension(50, 30));
		//rb.setText("按钮");
		
		p.add(rb);
		j.add(p);
		j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		j.setSize(200, 200);
		j.setVisible(true);

	}

}

转载于:https://my.oschina.net/winHerson/blog/40853