Source Code : Another Line Break Demo

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Another Line Break Demo

     

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.FontRenderContext;
import java.awt.font.LineBreakMeasurer;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.text.AttributedCharacterIterator;
import java.text.AttributedString;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class Main extends JPanel {
  String text = "this is a test. This is a test. This is a test. This is a test";

  AttributedString attribString = new AttributedString(text);

  AttributedCharacterIterator attribCharIterator;

  public Main() {
    setSize(350, 400);    
    attribString.addAttribute(TextAttribute.FOREGROUND, Color.blue, 0, text
        .length());
    attribString.addAttribute(TextAttribute.FONT, new Font("sanserif", Font.ITALIC, 20), 
        0, text.length());
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;

    attribCharIterator = attribString.getIterator();

    FontRenderContext frc = new FontRenderContext(null, false, false);
    LineBreakMeasurer lbm = new LineBreakMeasurer(attribCharIterator, frc);

    int x = 10, y = 20; 
    int w = getWidth(); 

    float wrappingWidth = w - 15;

    while (lbm.getPosition() < text.length()) {
      TextLayout layout = lbm.nextLayout(wrappingWidth);
      y += layout.getAscent();
      layout.draw(g2, x, y);
      y += layout.getDescent() + layout.getLeading();
    }
  }

  public static void main(String arg[]) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add("Center", new Main());
    frame.pack();
    frame.setSize(new Dimension(350, 400));
    frame.setVisible(true);
  }
}   
    
    
    
  

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