我制作了这个Java JFrame：
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Point;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.ScrollPaneConstants;
import javax.swing.UIManager;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import java.awt.Component;
import javax.swing.JTabbedPane;
import java.awt.Rectangle;
public class ServerFrame{
private JFrame frame;
private JTabbedPane tabbedPane;
public static void main(String [] args){
ServerFrame f=new ServerFrame();
}
protected ServerFrame(){
frame=new JFrame();
frame.setLocation(new Point(500, 100));
frame.setResizable(false);
frame.setTitle("JSock Network System - v1.0");
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}
catch (Exception e) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e1) {
e1.printStackTrace();
}
}
frame.getContentPane().setBackground(Color.DARK_GRAY);
frame.setSize(new Dimension(805, 462));
frame.setLocationRelativeTo(null);
frame.getContentPane().setMinimumSize(new Dimension(800, 600));
frame.getContentPane().setMaximumSize(new Dimension(800, 600));
frame.getContentPane().setPreferredSize(new Dimension(800, 600));
frame.getContentPane().setLayout(null);
tabbedPane = new JTabbedPane(JTabbedPane.TOP);
tabbedPane.setForeground(Color.DARK_GRAY);
tabbedPane.setBounds(new Rectangle(0, 0, 0, 333));
tabbedPane.setBorder(new EmptyBorder(0, 0, 0, 0));
tabbedPane.setFont(new Font("Segoe UI Semibold", Font.PLAIN, 12));
tabbedPane.setBackground(new Color(0,0,0,0));
tabbedPane.setOpaque(false);
tabbedPane.setBounds(5, 95, 789, 333);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
scrollPane.setViewportBorder(new EmptyBorder(0, 0, 0, 0));
scrollPane.setBackground(new Color(0,0,0,0));
scrollPane.setBorder(new LineBorder(new Color(192, 192, 192)));
scrollPane.getViewport().setOpaque(false);
scrollPane.setOpaque(false);
JTextArea textArea= new JTextArea();
textArea.setOpaque(false);
textArea.setForeground(Color.DARK_GRAY);
textArea.setFont(new Font("Consolas", Font.PLAIN, 10));
textArea.setEditable(false);
textArea.setBorder(new EmptyBorder(0, 0, 0, 0));
textArea.setBackground(new Color(0,0,0,0));
scrollPane.setViewportView(textArea);
tabbedPane.addTab("SERVER", null,scrollPane,null);
frame.getContentPane().add(tabbedPane);
JLabel lblNewLabel = new JLabel("QTminer");
lblNewLabel.setForeground(Color.WHITE);
lblNewLabel.setFont(new Font("Segoe UI", Font.BOLD, 71));
lblNewLabel.setBounds(317, 6, 305, 77);
frame.getContentPane().add(lblNewLabel);
JLabel lblNetworkSystem = new JLabel("JSockNS v1.0 Inside");
lblNetworkSystem.setAlignmentX(Component.CENTER_ALIGNMENT);
lblNetworkSystem.setForeground(Color.WHITE);
lblNetworkSystem.setFont(new Font("Segoe UI", Font.BOLD, 22));
lblNetworkSystem.setBounds(455, 68, 238, 39);
frame.getContentPane().add(lblNetworkSystem);
JLabel lblJsocknslog = new JLabel("JSockNS Log");
lblJsocknslog.setBounds(720, 400, 85, 26);
frame.getContentPane().add(lblJsocknslog);
lblJsocknslog.setForeground(Color.WHITE);
lblJsocknslog.setFont(new Font("Segoe UI Semilight", Font.PLAIN, 13));
JLabel background = new JLabel("");
background.setIcon(new ImageIcon("C:\\Users\\Francesco\\Desktop\\841887-light-blue-wallpaper.jpg"));
background.setBounds(-1121, -400, 2019, 912);
frame.getContentPane().add(background);
frame.setVisible(true);
}
}
我的问题是，如果我想使用Nimbus外观，我的TabbedPane变成透明的，没关系。但是如果我改成Metal或System Look And Feels，透明度就消失了。
这是显示此行为的图像。
[！[Nimbus和Syste L＆F] [1]] [1]
我想念什么？
编辑：
LuxxMiner解决方案带回了透明度：
UIManager.put("TabbedPane.contentOpaque", false);
在
frame= new ServerFrame()之前和：
scrollPane.setOpaque(false);
现在的问题是：
TabTitle不再是透明的，任何与Nimbus不同的L＆F。
此外，我讨厌tabbedPane的bordeline，我只是离开滚动面板的LineBorder：
scrollPane.setBorder(new LineBorder(new Color(192,192,192)));
如何使我的tabbedPane边框不可见？
最佳答案
主要回答：
在不同的LaF中使用TabbedPane似乎是一个问题。在执行ServerFrame f = new ServerFrame();之前，先放置以下内容：
Color transparent = new Color(0, 0, 0, 0);
UIManager.put("TabbedPane.contentAreaColor", transparent);
UIManager.put("TabbedPane.selected", transparent);
UIManager.put("TabbedPane.unselectedTabBackground", transparent);
UIManager.put("TabbedPane.background", transparent);
UIManager.put("TabbedPane.borderHightlightColor", transparent);
UIManager.put("TabbedPane.darkShadow", transparent);
UIManager.put("TabbedPane.shadow", transparent);
UIManager.put("TabbedPane.focus", transparent);
UIManager.put("TabbedPane.selectHighlight", transparent);
UIManager.put("TabbedPane.lightHighlight", transparent);
UIManager.put("TabbedPane.light", transparent);
UIManager.put("TabbedPane.contentBorderInsets", new Insets(0, 0, 0, 0));
您也可以将
UIManager.put("TabbedPane.contentAreaColor", transparent);替换为UIManager.put("TabbedPane.contentOpaque", false);。编辑：
还要添加以下内容：
scrollPane.setOpaque(false);
还有这个：
textArea.setOpaque(false);
其他建议：
调用
ServerFrame内部的EventQueue.invokeLater()以防止出现进一步的问题：EventQueue.invokeLater(new Runnable() { public void run() { ServerFrame f = new ServerFrame(); }});不要使用null-layout，而是查看layout managers。