Create Applet in Java

[sandguy82]

Today in Java, i will teach you how to create an applet in Java.

An applet is a small application that is viewed on the Web using java.

So, now let's start this tutorial!

1. Open JCreator or NetBeans and make a java program with a file name of sampleApplet.java. In the classname, extend a JApplet to have an applet library.

2. Import javax.swing.* and awt.* package because we will going to have the JLabel in swing and also the Container.

1. import
   
   javax.swing.*
   
   ;
   
2. import
   
   java.awt.*
   
   ;
   

3. Create a init() function to initialize an array. Then have this code inside the init() function.

1. 
   
2. public
   
   void
   
   init(
   
   )
   
   {
   
3. //create a container that will have the components to be placed
   
4. Container
   
   con =
   
   getContentPane(
   
   )
   
   ;
   
5. // have the flowlayout as the layout manager to directly arrange the component
   
6. con.setLayout
   
   (
   
   new
   
   FlowLayout
   
   (
   
   )
   
   )
   
   ;
   
7. // have the label to have the text "Hello World"
   
8. JLabel
   
   lbl =
   
   new
   
   JLabel
   
   (
   
   "Hello World!"
   
   )
   
   ;
   
9. // then add the label into the component
   
10. con.add
    
    (
    
    lbl)
    
    ;
    
11. }
    

Note: You have to build your program to have the .class file extension for viewing of the applet.

4. Now, create a new file. Click File Type, choose Other Folder and click HTML Applet.

After creating it, it will have the given code. Then in the Applet Code, put and encode your file name of the created java file, the sampleApplet.class. Follow this code below:

1. <!
   
   DOCTYPE HTML
   
   PUBLIC
   
   "-//W3C//DTD HTML 4.01 Transitional//EN"
   
   >
   
2. 
   
3. <
   
   html>
   
4. <
   
   head>
   
5. </
   
   head>
   
6. <
   
   body bgcolor=
   
   "000000"
   
   >
   
7. <
   
   center>
   
8. <
   
   applet
   
9. code =
   
   "sampleApplet.class"
   
10. width =
    
    "500"
    
11. height =
    
    "300"
    
12. >
    
13. </
    
    applet>
    
14. </
    
    center>
    
15. </
    
    body>
    
16. </
    
    html>
    

Press F5 to run the program.

Output:

Full source code of the sampleApplet.java:

1. import
   
   javax.swing.*
   
   ;
   
2. import
   
   java.awt.*
   
   ;
   
3. 
   
4. public
   
   class
   
   sampleApplet extends
   
   JApplet
   
   {
   
5. 
   
6. public
   
   void
   
   init(
   
   )
   
   {
   
7. 
   
8. Container
   
   con =
   
   getContentPane(
   
   )
   
   ;
   
9. con.setLayout
   
   (
   
   new
   
   FlowLayout
   
   (
   
   )
   
   )
   
   ;
   
10. JLabel
    
    lbl =
    
    new
    
    JLabel
    
    (
    
    "Hello World!"
    
    )
    
    ;
    
11. con.add
    
    (
    
    lbl)
    
    ;
    
12. }
    
13. 
    
14. }
    

Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer

If you have some queries, feel free to contact the number or e-mail below.
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