如何在一個標籤中放置圖像，使其看起來像一個圖標

Question

我想添加一個圖像到一個標籤，所以它看起來像一個圖標。我想把一個PNG圖像放在標籤上（查看圖片）
是否有可能在java中做到這一點？

Answer 1

JTabbedPane允許您提供一個組件作爲標籤「渲染器」（各種）。

查看JTabbedPane#setTabComponentAt瞭解更多詳情，並查看this example瞭解更多詳情。

已更新，例如

import java.awt.BorderLayout; 
import java.awt.EventQueue; 
import java.io.IOException; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import javax.imageio.ImageIO; 
import javax.swing.ImageIcon; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JTabbedPane; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 

public class TestTabbedPaneIcon { 

    public static void main(String[] args) { 
     new TestTabbedPaneIcon(); 
    } 

    public TestTabbedPaneIcon() { 
     EventQueue.invokeLater(new Runnable() { 
      @Override 
      public void run() { 
       try { 
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
       } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { 
       } 

       JTabbedPane tp = new JTabbedPane(); 
       tp.addTab("Dates", new JPanel()); 
       tp.addTab("Deliveries", new JPanel()); 
       tp.addTab("Exports", new JPanel()); 

       tp.setTabComponentAt(0, getLabel("Dates", "/Icon03.png")); 
       tp.setTabComponentAt(1, getLabel("Deliveries", "/Icon01.png")); 
       tp.setTabComponentAt(2, getLabel("Exports", "/Icon02.png")); 

       JFrame frame = new JFrame("Testing"); 
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
       frame.setLayout(new BorderLayout()); 
       frame.add(tp); 
       frame.pack(); 
       frame.setLocationRelativeTo(null); 
       frame.setVisible(true); 
      } 
     }); 
    } 

    protected JLabel getLabel(String title, String icon) { 
     JLabel label = new JLabel(title); 
     try { 
      label.setIcon(new ImageIcon(ImageIO.read(getClass().getResource(icon)))); 
     } catch (IOException ex) { 
      ex.printStackTrace(); 
     } 
     return label; 
    } 
} 

Answer 2

JTabbedPane中具有API設置到標籤的圖標，加入的標籤內容或更高時或者：

// when adding 
tabbedPane.addTab(String, Icon, Component); 
// after having added 
tabbedPane.setIconAt(int, Icon);