Draw arc on a canvas

/*--------------------------------------------------
* Arcs.java
*
* Draw arc on a canvas
*
* Example from the book:     Core J2ME Technology
* Copyright John W. Muchow   http://www.CoreJ2ME.com
* You may use/modify for any non-commercial purpose
*-------------------------------------------------*/  
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class Arcs extends MIDlet
{
  private Display  display;    // The display
  private ArcsCanvas canvas;   // Canvas 
 
  public Arcs()
  {
    display = Display.getDisplay(this);
    canvas  = new ArcsCanvas(this);
  }
 
  protected void startApp()
  {
    display.setCurrent( canvas );
  }
 
  protected void pauseApp()
  { }

  protected void destroyApp( boolean unconditional )
  { }
 
  public void exitMIDlet()
  {
    destroyApp(true);
    notifyDestroyed();
  }
}

/*--------------------------------------------------
* Class ArcsCanvas
*
* Draw arcs
*-------------------------------------------------*/
class ArcsCanvas extends Canvas implements CommandListener
{
  private Command cmExit;  // Exit midlet
  private Arcs midlet;
 
  public ArcsCanvas(Arcs midlet)
  {
    this.midlet = midlet;
    
    // Create exit command & listen for events
    cmExit = new Command("Exit", Command.EXIT, 1);
    addCommand(cmExit);
    setCommandListener(this);
  } 

  /*--------------------------------------------------
  * Draw an arc 
  *-------------------------------------------------*/
  protected void paint(Graphics g)
  {
    // Start at 3 o'clock and rotate 225 degrees
    g.drawArc(5, 5, 75, 75, 0, 225);
//    g.fillArc(5, 5, 75, 75, 0, 225);
    
    // Start at 12 o'clock and rotate 225 degrees    
//    g.drawArc(5, 5, 75, 75, 90, 225);    

    // Change the size of the bounding box
    // Start at 12 o'clock and rotate 225 degrees
//    g.drawArc(25, 35, 30, 50, 90, 225);    

  }

  public void commandAction(Command c, Displayable d)
  {
    if (c == cmExit)
      midlet.exitMIDlet();
  }
}
Related examples in the same category

1.	Rectangle Example
2.	Rectangles
3.	Filled Rectangle Example
4.	Arc
5.	Arc Filled Example
Draw arc on a canvas : Shape « J2ME « Java

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