Tutorials : Java by Example : Section 1 :

//Sourcecode import java.awt.*; import java.applet.*; //Introduces methods public class Project2 extends Applet { //We need a global graphics object if //we use functions which use graphics: public Graphics g; //This is our method. It's only parameter is //the y-coordinate of the text string. public void Hallo(int y) { g.setColor(Color.black); g.drawString("Hallo Java!",120,y); } public void paint (Graphics gr) { g=gr; //We call our method several times //with different parameters Hallo(50); Hallo(100); Hallo(150); Hallo(200); Hallo(250); } }

The most common basic variable types in Java are:

Name	What is it	Range	Example
boolean	logical	true or false	true
int	32 bit signed number	-231 .. +231-1	123789
long	64 bit signed number	-263 .. +263-1	123456789
float	32 bit floating point number	ca. 7 places accuracy	3.14
double	64 bit floating point number	ca. 15 places accuracy	0.00032424
String	text	-	"This is a text"

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