The Java Boutique: Java Tutorial: Java by Example: Operators and Methods

Tutorials : Java by Example : Section 2 :

Section Two Contents

Operators and Methods

Using Methods and Basic Mouse Funtions

This example demonstrates the use of a simple method with more than one parameter. The smiley is drawn from inside the method void Smiley(int x, int y), so you can draw several smileys by just calling that method with different parameters for the coordinates.

//Sourcecode

import java.awt.*; import java.applet.*; //Introduces methods with more than one parameter //and getting the size of the applet public class Project4 extends Applet { //global graphics object public Graphics g; //our method with 2 parameters for the x- and y coordinate of our smiley public void Smiley(int x, int y) { //smileys face g.setColor(Color.yellow); g.fillOval(x,y,30,30); //his eyes g.setColor(Color.blue); g.fillOval(x+6,y+7,6,6); g.fillOval(x+18,y+7,6,6); //the mouth, a red oval and a yellow one shifted upwards g.setColor(Color.red); g.fillOval(x+5,y+15,20,8); g.setColor(Color.yellow); g.fillOval(x+6,y+13,18,8); } public void paint (Graphics gr) { g=gr; //paint the background blue - this time we measure the size //of the applet to get the size of the background rectangle g.setColor(Color.blue); g.fillRect(0,0,size().width,size().height); //now we call our method with different parameters Smiley(50,50); Smiley(150,90); Smiley(250,80); Smiley(180,10); Smiley(120,230); } }

Applet Index
(sorted alphabetically)
A B C D E F G H I J K
L M N O P Q R S T U
V W X Y Z #s

The Java Source
(applets w/source code)
A B C D E F G H I J K
L M N O P Q R S T U
V W X Y Z

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