Text Example in J2ME

In J2ME programming language canvas class is used to paint and draw the diagrams. Using the same canvas class we are going to draw a box around the text in our show text MIDlet Example.

Text Example in J2ME

Text Example in J2ME

     

In J2ME programming language canvas class is used to paint and draw the diagrams. Using the same canvas class we are going to draw a box around the text in our show text MIDlet Example. We have created a class called CanvasBoxText that extends the predefined canvas class to draw the box. In the code we have used different methods to get the values, these are..

  • int width = getWidth();   
  • int height = getHeight();  
  • g.setColor(255, 0, 0);   
  • g.fillRect(0, 0, width, height);   
  • g.setColor(0, 0, 255);  
  • String sandeep = "SANDEEP";   
  • int w = font.stringWidth(sandeep);   
  • int h = font.getHeight();   
  • int x = (width - w) / 2;   
  • int y = height / 2;  
  • g.setFont(font);   
  • g.drawString(sandeep, x, y, Graphics.TOP | Graphics.LEFT);   
  • g.drawRect(x, y, w, h);

After running the example you will get the output as given below..

In the output you can easily find out the text "SANDEEP" that is been displayed in the box. As I mentioned earlier, we need a canvas class to draw such kind of graphics in the J2ME application.

J2ME Source Code "BoxTextCanvas.java"

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class BoxTextCanvas extends MIDlet{
  private Display display;

  public void startApp(){
  Canvas canvas = new CanvasBoxText();
  display = Display.getDisplay(this);
  display.setCurrent(canvas);
  }

  public void pauseApp(){}

  public void destroyApp(boolean unconditional){}
}

class CanvasBoxText extends Canvas{
  private Font font;

  public CanvasBoxText(){
  font = Font.getFont(Font.FACE_PROPORTIONAL, 
  Font.STYLE_PLAIN, Font.SIZE_LARGE);
  }

  public void paint(Graphics g){
  int width = getWidth();
  int height = getHeight();

  g.setColor(255, 0, 0);
  g.fillRect(0, 0, width, height);
  g.setColor(0, 0, 255);

  String sandeep = "SANDEEP";
  int w = font.stringWidth(sandeep);
  int h = font.getHeight();
  int x = (width - w) / 2;
  int y = height / 2;

  g.setFont(font);
  g.drawString(sandeep, x, y, Graphics.TOP | Graphics.LEFT);
  g.drawRect(x, y, w, h);
  }
}

Download Source Code

Tutorials

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  6. Phone Book Midlet Example
  7. Date Field Midlet Example
  8. Command Midlet Example
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  12. Radio Button in J2ME
  13. J2ME List Image
  14. List in J2ME
  15. J2ME Canvas Example
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  18. Creating Menu Using Canvas Class
  19. Creating Canvas Form Example
  20. J2ME Thread Processing Example
  21. Draw Line in J2me
  22. Draw Rectangle in J2ME
  23. Draw Font Using Canvas Example
  24. Draw String Using Canvas
  25. Interactive, Non-Interactive Gauge Example
  26. Creating Volume Bar Using Gauge Class
  27. Image Item Using Canvas Example
  28. Image Icon Using Canvas Example
  29. Draw Clip Area Using Canvas
  30. Player Class in J2ME
  31. Draw arc in J2ME
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  33. Building a J2ME sliding menu with text and images(part-2)
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