Another Line Break Demo : Text Layout « 2D Graphics GUI « Java

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,, 0, text
    attribString.addAttribute(TextAttribute.FONT, new Font("sanserif", Font.ITALIC, 20), 
        0, text.length());

  public void paintComponent(Graphics 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.add("Center", new Main());
    frame.setSize(new Dimension(350, 400));

Related examples in the same category

1.JFreeChart: Draw String DemoJFreeChart: Draw String Demo
2.Unicode: test layoutUnicode: test layout
3.Unicode displayUnicode display
4.Line break for textlayoutLine break for textlayout
5.Mouse hit and textlayoutMouse hit and textlayout
6.TextLayout demoTextLayout demo
7.Draw text along a curveDraw text along a curve
8.TextHitInfo Demo: tell you which is the letter you are clickingTextHitInfo Demo: tell you which is the letter you are clicking
9.TextAttribute: Underline and strike throughTextAttribute: Underline and strike through
10.TextAttribute: color and fontTextAttribute: color and font
11.Hightlight text by drag and selectionHightlight text by drag and selection
12.LineMetrics: the metrics to layout characters along a lineLineMetrics: the metrics to layout characters along a line
13.Paragraph LayoutParagraph Layout
14.Caret actionCaret action
15.Caret and TextLayoutCaret and TextLayout
16.A display of text, formatted by us instead of by AWT/SwingA display of text, formatted by us instead of by AWT/Swing
17.Draw text with TextLayout
18.Drawing a Paragraph of Text
19.Getting the Shape from the Outline of Text
20.Drawing Text with Mixed Styles
21.Drawing multi-line text with AttributedString and LineBreakMeasurer
22.Draws the string at the specified location underlining the specified character
23.Renders a paragraph of text (line breaks ignored) to an image (created and returned).