Text:
父容器setBackgroundMode(SWT.INHERIT_FORCE);

Button:
1.构造一个空Image
2.利用org.eclipse.swt.widgets.Control.print(org.eclipse.swt.graphics.GC)将父容器上的内容绘制上去.
3.计算自己在父容器的区域,将Image那个区域的Image调用org.eclipse.swt.graphics.GC.drawImage(org.eclipse.swt.graphics.Image, int, int, int, int, int, int, int, int)绘制上去.
4.如果想实现蒙板效果,在3后再设置gc.setAlpha(200);gc.fillRectangle(0,0,w,h);即可.

package com.test;

import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.BorderFactory;
import javax.swing.border.TitledBorder;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import java.awt.Rectangle;

public class Test2 extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JButton jButton = null;

/**
 * This is the default constructor
 */
public Test2() {
    super();
    initialize();
}

/**
 * This method initializes this
 * 
 * @return void
 */
private void initialize() {
    this.setSize(300, 200);
    this.setContentPane(getJContentPane());
    this.setTitle("JFrame");
}

/**
 * This method initializes jContentPane
 * 
 * @return javax.swing.JPanel
 */
private JPanel getJContentPane() {
    if (jContentPane == null) {
        jContentPane = new JPanel();
        jContentPane.setLayout(null);
        jContentPane.setBackground(new Color(102, 255, 102));
        jContentPane.add(getJButton(), null);
    }
    return jContentPane;
}

/**
 * This method initializes jButton
 * 
 * @return javax.swing.JButton
 */
private JButton getJButton() {
    if (jButton == null) {
        jButton = new JButton();
        jButton.setBounds(new Rectangle(98, 29, 124, 35));
        jButton.setText("aaaaaa");
        jButton.setBackground(new Color(102, 0, 204));
        jButton.setFont(new Font("Dialog", Font.BOLD, 24));
        // jButton.setForeground(new Color(255, 51, 0));
        jButton.setOpaque(false);
        jButton.setBorder(BorderFactory.createEmptyBorder());
    }
    return jButton;
}

}

你运行这个看看怎么样？

这个是用图片的
package sample;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class Frame extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JButton jButton = null;
private JPanel jPanel = null;

/**
 * This is the default constructor
 */
public Frame() {
    super();
    initialize();
}

/**
 * This method initializes this
 * 
 * @return void
 */
private void initialize() {
    this.setSize(513, 309);
    this.setContentPane(getJContentPane());
    this.setTitle("JFrame");
}

/**
 * This method initializes jContentPane
 * 
 * @return javax.swing.JPanel
 */
private JPanel getJContentPane() {
    if (jContentPane == null) {
        jContentPane = new JPanel();
        jContentPane.setLayout(null);

        jContentPane.add(getJPanel(), null);
    }
    return jContentPane;
}

/**
 * This method initializes jButton
 * 
 * @return javax.swing.JButton
 */
private JButton getJButton() {
    if (jButton == null) {
        jButton = new JButton();
        jButton.setBounds(new Rectangle(34, 27, 150, 44));
        jButton.setText("愛我老婆");
        jButton.setBorder(null);
                        //下面这句设置背景颜色必须要否则无法实现背景透明
        jButton.setBackground(Color.BLACK);
        jButton.setOpaque(false);
        jButton.setForeground(Color.red);
        jButton.setFont(new Font("",Font.BOLD,24));
    }
    return jButton;
}

class getpane extends JPanel {
    private static final long serialVersionUID = 1L;
    int width = 0, hight = 0;
    String imgpath = "";

    public getpane(int width, int hight, String imgpath) {
        this.width = width;
        this.hight = hight;
        this.imgpath = imgpath;
        this.setOpaque(true);
    }

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        ImageIcon icon = new ImageIcon(imgpath);
        Image img = icon.getImage();
        g.drawImage(img, 0, 0, width, hight, this);
    }
}

/**
 * This method initializes jPanel
 * 
 * @return javax.swing.JPanel
 */
private JPanel getJPanel() {
    if (jPanel == null) {
    String imgpath = "src/game/image/good02.jpg";
    jPanel = new getpane(this.getWidth(), this.getHeight(), imgpath);
        // jPanel = new JPanel();
    jPanel.setLayout(null);
    jPanel.setBounds(new Rectangle(13, 8, 472, 251));
    jPanel.add(getJButton(), null);
    }
    return jPanel;
}

}

[quote="yqklw521"]package com.test;

import java.awt.BorderLayout;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.BorderFactory;
import javax.swing.border.TitledBorder;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import java.awt.Rectangle;

public class Test2 extends JFrame {

private static final long serialVersionUID = 1L;
private JPanel jContentPane = null;
private JButton jButton = null;

/**
 * This is the default constructor
 */
public Test2() {
    super();
    initialize();
}

/**
 * This method initializes this
 * 
 * @return void
 */
private void initialize() {
    this.setSize(300, 200);
    this.setContentPane(getJContentPane());
    this.setTitle("JFrame");
}

/**
 * This method initializes jContentPane
 * 
 * @return javax.swing.JPanel
 */
private JPanel getJContentPane() {
    if (jContentPane == null) {
        jContentPane = new JPanel();
        jContentPane.setLayout(null);
        jContentPane.setBackground(new Color(102, 255, 102));
        jContentPane.add(getJButton(), null);
    }
    return jContentPane;
}

/**
 * This method initializes jButton
 * 
 * @return javax.swing.JButton
 */
private JButton getJButton() {
    if (jButton == null) {
        jButton = new JButton();
        jButton.setBounds(new Rectangle(98, 29, 124, 35));
        jButton.setText("aaaaaa");
        jButton.setBackground(new Color(102, 0, 204));
        jButton.setFont(new Font("Dialog", Font.BOLD, 24));
        // jButton.setForeground(new Color(255, 51, 0));
        jButton.setOpaque(false);
        jButton.setBorder(BorderFactory.createEmptyBorder());
    }
    return jButton;
}

}

你运行这个看看怎么样？[/quote]

连题目都不看清。

你傻啦，你把那控件改成awt的控件不就是一樣的嗎？好心沒好報，笨到家了。

单控件透明，还是控件的parent设置为透明？
单控件透明的话需要自行定制

不是不想给demo,这个东西要完善的实现确实很复杂,而且低效.我建议你可以用Label代替button,通过设置父容器setBackgroundMode(SWT.INHERIT_DEFAULT);就可透明显示label.然后你给label增加一个PaintListern,自己使用GC绘制一个正方框表示button的轮廓.或者你做一个只有边框,中间透明的png图片.设置给Label,也可以.