How do I reduce the space between lines in a JTextComponent?

Question

I've searched pretty thoroughly in this forum and can't find an answer.
My editor displays text fine, but I'm not happy with the space between lines. Is there any way I can reduce the overall height of each line just to close the gap a little?

Answer 1

Okay, I've got it worked out. I reckon it will work for my purposes although I have yet to test it in my app.
The trick is to use a negative value for the StyleConstants.setSpaceAbove(spacing2, -5.0f);The code below shows a comparison between a text pane with default spacing values and a text pane with that -5 space above value.
import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
public class TestTextPane extends JFrame
public TestTextPane()
     super("Text Pane Test: LineSpacing");
JPanel panel = new JPanel();
setContentPane( panel );
JTextPane textPane = new JTextPane();
textPane.setFont( new Font("monospaced", Font.PLAIN, 12) );
textPane.setText( "abcdefghijklmnop\none\ntwo" );
SimpleAttributeSet spacing = new SimpleAttributeSet();
StyleConstants.setLineSpacing(spacing, 0.0f);
StyleConstants.setFirstLineIndent(spacing, 0.0f);
StyleConstants.setSpaceAbove(spacing, 0.0f);
StyleConstants.setSpaceBelow(spacing, 0.0f);
StyleConstants.setUnderline(spacing, false);
StyleConstants.setItalic(spacing, false);
StyleConstants.setBold(spacing, false);
//this line sets the attributes for the text specified by the first two arguments.
textPane.getStyledDocument().setParagraphAttributes(0, textPane.getDocument().getLength(), spacing, true);
JScrollPane scrollPane = new JScrollPane( textPane );
scrollPane.setPreferredSize( new Dimension( 200, 200 ) );
//set up the comparison
JTextPane textPane2 = new JTextPane();
textPane2.setFont( new Font("monospaced", Font.PLAIN, 12) );
textPane2.setText( "abcdefghijklmnop\none\ntwo" );
SimpleAttributeSet spacing2 = new SimpleAttributeSet();
StyleConstants.setLineSpacing(spacing2, 0.0f);
StyleConstants.setFirstLineIndent(spacing2, 0.0f);
StyleConstants.setSpaceAbove(spacing2, -5.0f);
StyleConstants.setSpaceBelow(spacing2, 0.0f);
StyleConstants.setUnderline(spacing2, false);
StyleConstants.setItalic(spacing2, false);
StyleConstants.setBold(spacing2, false);
//this line sets the attributes for the text specified by the first two arguments.
textPane2.getStyledDocument().setParagraphAttributes(0, textPane2.getDocument().getLength(), spacing2, true);
JScrollPane scrollPane2 = new JScrollPane( textPane2 );
scrollPane2.setPreferredSize( new Dimension( 200, 200 ) );
panel.setLayout(new FlowLayout());
panel.add( scrollPane );
panel.add( scrollPane2);
public static void main(String[] args)
TestTextPane frame = new TestTextPane();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}