怎样把jdialog变透明？

Question

怎样把jdialog变透明？

Answer 1

给你一份完整的代码 import java.awt.BorderLayout; 
import java.awt.Dialog; 
import java.awt.Dimension; 
import java.awt.FlowLayout; 
import java.awt.Graphics; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.io.File; 
import java.net.URL; 
import javax.swing.Box; 
import javax.swing.ImageIcon; 
import javax.swing.JButton; 
import javax.swing.JDialog; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTextPane; 
import javax.swing.text.html.HTMLDocument; 
import javax.swing.text.html.HTMLEditorKit; public class Ebook extends JDialog{ 
    private MyShow myshows; 
    private JTextPane textpane; 
    public Ebook(final MyShow myshows){ 
        super((Dialog)null, true); 
        this.myshows = myshows; 
        this.setUndecorated(true); 
        extraInitComponents(true); 
        initGUI(); 
        
    } 
    private void initGUI(){ 
        setBak(); 
        this.getContentPane().setLayout(new BorderLayout()); 
        textpane = createHTMLPane(); 
        JScrollPane jsc = new JScrollPane(textpane); 
        URL url = null; 
        StringBuffer page = new StringBuffer(); 
        StringBuffer str = new StringBuffer(); 
        str.append("C:\\zh_CN"); 
        page.append("file:/"); 
        page.append(str); 
        page.append(File.separator); 
        page.append("ebook.htm"); 
        try { 
            url = new URL(page.toString()); 
            textpane.setPage(url); 
        } catch (Exception ex) { 
        } 
         JPanel centerPanel = new JPanel(new BorderLayout());         centerPanel.setOpaque(false); 
        centerPanel.add(jsc,BorderLayout.CENTER); 
        centerPanel.setPreferredSize(new Dimension(50, 50)); 
        centerPanel.setMinimumSize(new Dimension(50, 50)); 
        centerPanel.setMaximumSize(new Dimension(50, 50)); 
        this.getContentPane().add(centerPanel,BorderLayout.CENTER); 
        JPanel button = new JPanel(new FlowLayout(FlowLayout.RIGHT)); 
        JButton close = new JButton("close"); 
        close.setPreferredSize(new Dimension(75, 25)); 
        close.setMinimumSize(new Dimension(75, 25)); 
        close.setMaximumSize(new Dimension(75, 25)); 
        close.addActionListener(new ActionListener() { 
            public void actionPerformed(ActionEvent e) { 
                setVisible(false); 
            } 
        });         button.add(close); 
        button.add(Box.createHorizontalStrut(75)); 
        button.setOpaque(false); 
        this.getContentPane().add(button,BorderLayout.SOUTH); 
        this.getContentPane().add(Box.createVerticalStrut(80),BorderLayout.NORTH); 
        this.getContentPane().add(Box.createHorizontalStrut(80),BorderLayout.WEST); 
        this.getContentPane().add(Box.createHorizontalStrut(80),BorderLayout.EAST); 
        ((JPanel) this.getContentPane()).setOpaque(false); 
    }     public void ShowUI(){ 
        setVisible(true); 
    }     private void setBak() { 
        ((JPanel) this.getContentPane()).setOpaque(false); 
        StringBuffer imagestr = new StringBuffer(); 
        imagestr.append("C:\\back.PNG"); 
        final ImageIcon img = new ImageIcon(imagestr.toString()); 
        JLabel background = new JLabel(img){ 
            @Override 
            protected void paintComponent(Graphics g) { 
                super.paintComponent(g); 
                g.drawImage(img.getImage(), 0,0,img.getIconWidth(),img.getIconHeight(),null); 
                g.dispose(); 
            } 
        }; 
        getLayeredPane().add(background, new Integer(Integer.MIN_VALUE)); 
        background.setBounds(0, 0, img.getIconWidth(), img.getIconHeight()); 
        setSize(400, 300); 
    }      public void extraInitComponents(boolean ifFirstInit) { 
            setLocationRelativeTo(myshows); 
            setAlwaysOnTop(true); 
            com.sun.awt.AWTUtilities.setWindowOpaque(this, false); 
    }      public static JTextPane createHTMLPane() { 
        JTextPane textPane; 
        textPane = new JTextPane(); 
        HTMLEditorKit kit = new HTMLEditorKit();//kit s ur HTMLEditorKit 
        HTMLDocument doc = (HTMLDocument) (kit.createDefaultDocument()); 
        textPane.setEditorKit(kit);//'this' is ur JTextPane object 
        textPane.setDocument(doc); 
        textPane.setEditable(false); 
        return textPane; 
    } 
}希望对你有帮助

Answer 2

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;import com.sun.awt.AWTUtilities;@SuppressWarnings("serial")
public class Test extends JPanel {    public Test() {
        add(new JButton("Hi"));
        add(new JButton("Biao"));
        add(new JCheckBox("Check"));
    }    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new Test());
        AWTUtilities.setWindowOpacity(frame, 0.5f);        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(400, 500);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}

Answer 3

AWTUtilities.setWindowOpacity(frame, 0.5f);这句话就够了！

Answer 4

   重点就是这句话：AWTUtilities.setWindowOpacity(frame, 0.5f);在SWT插件里就可以看的出很明显的效果。

Answer 5

import com.sun.awt.AWTUtilities;
这个AWTUtilities  咋弄的？
这个包 是下载的吗？？