Rectangle Canvas MIDlet Example

The example illustrates how to draw the different types of rectangle in J2ME. We have created CanvasRectangle class in this example that extends to the Canvas class to draw the given types of rectangle. In this figure first two rectangle draw from the solid and dotted line and the other two rectangle draw as round Rectangle shape. To draw these types of rectangle we are useing following methods:

int width = getWidth();
int height = getHeight();
g.setColor(255, 162, 117);
g.fillRect(0, 0, width, height);
g.setColor(0, 0, 255);
g.drawRect(width/4, 0, width/2, height/4);
g.setStrokeStyle(Graphics.DOTTED);
g.drawRect(width/4 + 4, 4, width/2 - 8, height/4 - 8);
g.setStrokeStyle(Graphics.SOLID);
g.drawRoundRect(width/4, height/2, width/2, height/4, 16, 8);
g.setStrokeStyle(Graphics.SOLID);
g.drawRoundRect(width/4 + 4, height/2 + 4, width/2 - 8, height/4 - 8, 16, 8);

The Application is as follows:

Source Code of RectangleCanvas.java

import javax.microedition.midlet.*;

import javax.microedition.lcdui.*;

              

public class RectangleCanvas extends MIDlet{

  private Display display;

              

  public void startApp(){

    Canvas canvas = new CanvasRectangle();

    display = Display.getDisplay(this);

    display.setCurrent(canvas);

  }

              

  public void pauseApp(){}

              

  public void destroyApp(boolean unconditional){}

}

              

class CanvasRectangle extends Canvas {

    public void paint(Graphics g) {

        int width = getWidth();

        int height = getHeight();

              

        g.setColor(255, 162, 117);

        g.fillRect(0, 0, width, height);

              

        g.setColor(0, 0, 255);

        g.drawRect(width/4, 0, width/2, height/4);

              

        g.setStrokeStyle(Graphics.DOTTED);

        g.drawRect(width/4 + 4, 4, width/2 - 8, 

                      height/4 - 8);

              

        g.setStrokeStyle(Graphics.SOLID);

        g.drawRoundRect(width/4, height/2, width/2, 

                      height/4, 16, 8);

              

        g.setStrokeStyle(Graphics.SOLID);

        g.drawRoundRect(width/4 + 4, height/2 + 4, 

                      width/2 - 8, height/4 - 8, 16, 8);

    }

}

Download Source Code