Chapter 2

Creating a Java Application and Applet

The Start of a Java App.

Public class className

{

public static void main(String[] args)

{

}

}

Output a String

Syntax: system.out.println(“texts”);

Examples:system.out.println(“Welcome!”);

Include a Java Package

• Syntax: import java.XXX.XXX

• Examples: import java.io.*

import java.applet.*

The Start of a Java Applet

import java.awt.*;

import java.applet.*;

public class className extends Applet

{

public void paint(Graphics g)

{

}

}

Draw a String

Syntax: g.drawString(“texts”, x-pos, y-pos);

Examples:Public void paint(Graphics g)

{

g.drawString(“Welcome”, 400, 200);

}

Draw a PictureSyntax:

Image imageObj = getImage(getDocumentBase, “image_file_name”);

g.drawImage(imageObj, x-pos, y-pos, this);

Examples:public void paint(Graphics g){

Image smile = getImage(getDocumentBase, “smile.gif”);

g.drawImage(smile, 400, 200, this);}

Set Background Color

• Syntax: setBackground(Color.color);

• Example:

public void paint(Graphics g)

{

setBackground(Color.pink);

}