Demonstration of CodeMirrors Java highlighter written by Patrick Wied

package example;

import java.awt.*;

/**
 * This class subclasses DrawableRect and adds colors to the rectangle it draws
 **/
public class ColoredRect extends DrawableRect {
  // These are new fields defined by this class.
  // x1, y1, x2, and y2 are inherited from our super-superclass, Rect.
  @AnnotationTest
  protected Color border, fill;
  private String name;

/**
   * This constructor uses super() to invoke the superclass constructor, and
   * also does some initialization of its own.
   **/
  public ColoredRect(int x1, int y1, int x2, int y2, Color border, Color fill){
    super(x1, y1, x2, y2);
    /* This
    is a block comment */
    this.border = border;
    this.fill = fill;
    this.name = "This is a string";
  }

/**
   * This method overrides the draw() method of our superclass so that it
   * can make use of the colors that have been specified.
   **/
  public void draw(Graphics g) {
    g.setColor(fill);
    g.fillRect(x1, y1, x2, y2);
    g.setColor(border);
    g.drawRect(x1, y1, x2, y2);
  }
}