plot2dmidlet.java

j2me的程序

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.lang.Math;

public class Plot2DMIDlet extends MIDlet implements CommandListener{
     private Command exitCommand;
     Display display;

     int[] line1={80,20,60,70,50,20};
     int[] line2={20,10,50,60,90,60};

     int maxX;
     int maxY;

//   public Plot2DMIDlet() {
//
//   }

    public void startApp(){
        maxX=Math.max(line1.length,line2.length)-1;

        maxY=0;
        for(int i=0; i<line1.length; i++) {
            maxY=Math.max(maxY,line1[i]);
        }
        for(int i=0; i<line2.length; i++) {
            maxY=Math.max(maxY,line2[i]);
        }

        maxY+=10;

  		Display display = Display.getDisplay(this);
        Displayable d = new Plot2DCanvas(line1,line2,maxX,maxY);
        exitCommand = new Command("离开", Command.EXIT, 1);

        d.addCommand(exitCommand);
        d.setCommandListener(this);

        display.setCurrent(d);

    }

    public void pauseApp() { }
    public void destroyApp(boolean unconditional) {  }
    public void commandAction(Command c, Displayable s) {
	          notifyDestroyed();
    }

}