Create mobile application with J2ME : line Canvas

Any canvas-based graphical user interface contains instances of the particular Canvas school inside of which usually the particular designer generates photos for instance people found in a  game. On this phase you’ll understand in regards to the Control class and stay released to be able to varieties. The canvas is divided into a virtual grid in which each cell represents one pixel. Coordinates mark the column and row of a cell within the grid . The x coordinate represents the column, and the y coordinate represents the cell’s row. The first cell located in the upper-left corner of the grid has the coordinate location of 0, 0, where the first zero is the x coordinate and the other zero is the y coordinate.

Low  lets coding , i will create simple line with canvas.
import the package ;
import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.*;


Or import all package from icdui
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

Create Class

public class line extends MIDlet {
    private Write canvas;
     Display display;
    public void startApp() {
       display = Display.getDisplay(this);
       canvas = new Write(this);
       display.setCurrent(canvas);  
    }
    public void pauseApp() {
    }
    public void destroyApp(boolean unconditional) {
    }
}

Create class for drawing

class Write extends Canvas  {
     line midlet;
    private final line This;

    public Write(line This) {
        this.midlet= midlet;
      this.This = This;
    }

    protected void paint(Graphics drwa) {
        drwa.setColor(255,255,255);
    drwa.fillRect(0,0,getWidth(),getHeight());
        drwa.setColor(0,0,0);
        drwa.drawLine(getWidth(), getHeight(), 0, 0);
        drwa.setColor(255,0,0);
        drwa.drawLine(getWidth(), 0, 0, getHeight());
    }

Posted in: J2ME,Java,Netbeans