在TitledBorder中删除标题周围的空格

Question

如何在TitledBorder中删除标题周围的空格？我是说这个红色的边框

一段代码：

Font f = new Font(Font.DIALOG, Font.PLAIN, 14);
Map m = f.getAttributes();
m.put(TextAttribute.BACKGROUND, Color.yellow);
Font ff = new Font(m);
Border mb = BorderFactory.createMatteBorder(20, 0, 0, 0, Color.yellow);
Border test = BorderFactory.createEmptyBorder(-2,-2,-2,-2);
Border mb6 = BorderFactory.createTitledBorder(mb, "Title", TitledBorder.CENTER, TitledBorder.TOP, ff, Color.DARK_GRAY);
mb6 = BorderFactory.createCompoundBorder(test, mb6);
Border mb2 = BorderFactory.createMatteBorder(1, 0, 0, 0, Color.gray);
mb2 = BorderFactory.createCompoundBorder(test,mb2);
Border mb3 = BorderFactory.createCompoundBorder(mb6, mb2);
Border mb4 = BorderFactory.createMatteBorder(1, 1, 1, 1, Color.gray);
Border mb5 = BorderFactory.createCompoundBorder(mb4, mb3);
modeSetPanel.setBackground(Color.red);
modeSetPanel.setBorder(mb5);

Answer 1

如果您不关心边框，可以在“设置”选项卡面板中添加一个JPanel。在这个JPanel中，您可以使用BorderLayout添加另一个add。在带有BorderLayout的一个里面添加两个JPanels:北边的是黄色背景，中间的是红色背景。只需向黄色的JPanel添加一个标明"Title“的标题，并将您的控件添加到红色的JLabel。

标签周围的红色边框消失了。

下面是一个没有任何边框的示例，使用Nimbus外观：

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Answer 2

事实上，这不是一个答案，但评论中的图片是不可能的……

我试过这段代码：

import java.awt.Color;
import java.awt.Font;
import java.awt.font.TextAttribute;
import java.util.Map;

import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;
import javax.swing.border.TitledBorder;

public class RedBorderProblem extends JFrame {

    public RedBorderProblem() {
        final JPanel modeSetPanel = new JPanel();

        final Font f = new Font( Font.DIALOG, Font.PLAIN, 14 );
        final Map m = f.getAttributes();
        m.put( TextAttribute.BACKGROUND, Color.yellow );
        final Font ff = new Font( m );
        final Border mb = BorderFactory.createMatteBorder( 20, 0, 0, 0, Color.yellow );
        final Border test = BorderFactory.createEmptyBorder( -2, -2, -2, -2 );
        Border mb6 = BorderFactory.createTitledBorder( mb, "Title", TitledBorder.CENTER, TitledBorder.TOP, ff,
                Color.DARK_GRAY );
        mb6 = BorderFactory.createCompoundBorder( test, mb6 );
        Border mb2 = BorderFactory.createMatteBorder( 1, 0, 0, 0, Color.gray );
        mb2 = BorderFactory.createCompoundBorder( test, mb2 );
        final Border mb3 = BorderFactory.createCompoundBorder( mb6, mb2 );
        final Border mb4 = BorderFactory.createMatteBorder( 1, 1, 1, 1, Color.gray );
        final Border mb5 = BorderFactory.createCompoundBorder( mb4, mb3 );
        modeSetPanel.setBackground( Color.red );
        modeSetPanel.setBorder( mb5 );

        this.add( modeSetPanel );

        this.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
        this.pack();
        this.setVisible( true );
    }

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

}

结果就是

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