JLabel Component in Java

[J0r12]

This is a tutorial in which we will going to create a program that has the JLabel Component using Java. The JLabel lets the user display a short text string or an image, or both. You cannot input a text on JLabel and cannot have the keyboard focus on it.

So, now let's start this tutorial!

1. Open JCreator or NetBeans and make a java program with a file name of jLabelComponent.java.

2. Import the following packages below:

1. import
   
   java.awt.*
   
   ;
   
   // used to access the FlowLayout Class
   
2. import
   
   javax.swing.*
   
   ;
   
   //used to access the JFrame and JLabel class
   

3. Initialize your variable in your Main, variable frame for creating JFrame, and variable label1 to label5 for your JLabel component.

1. JFrame
   
   frame =
   
   new
   
   JFrame
   
   (
   
   "JLabel Component"
   
   )
   
   ;
   
2. 
   
3. JLabel
   
   label1 =
   
   new
   
   JLabel
   
   (
   
   "Student ID:"
   
   , JLabel
   
   .LEFT
   
   )
   
   ;
   
4. JLabel
   
   label2 =
   
   new
   
   JLabel
   
   (
   
   "First Name:"
   
   , JLabel
   
   .RIGHT
   
   )
   
   ;
   
5. JLabel
   
   label3 =
   
   new
   
   JLabel
   
   (
   
   "Last Name:"
   
   , JLabel
   
   .RIGHT
   
   )
   
   ;
   
6. JLabel
   
   label4 =
   
   new
   
   JLabel
   
   (
   
   "Age:"
   
   , JLabel
   
   .LEFT
   
   )
   
   ;
   
7. JLabel
   
   label5 =
   
   new
   
   JLabel
   
   (
   
   "Student Information"
   
   , JLabel
   
   .CENTER
   
   )
   
   ;
   

As you can see the above code,I have created 5 labels with their corresponding text and alignments. I have used the parameter of the JLabel which is the JLabel(String text, int horizontal alignment). And also you can put image on that using the ImageIcon class. The JLabel.LEFT indicates the alignment to left, JLabel.RIGHT indicates the alignment to left and JLabel.CENTER indicates the alignment to center.

Now, to set the vertical alignment of the label, we will use the setVerticalAlignment method and we will use the center orientation in the label5 variable. To have also the tooltip in the label, we will use of the setToolTipText method.

1. label5.setVerticalAlignment
   
   (
   
   JLabel
   
   .CENTER
   
   )
   
   ;
   
2. label5.setToolTipText
   
   (
   
   "This is a label!"
   
   )
   
   ;
   

When running the program, this image will be the first to be shown.

4. To add the labels to the frame, have this code below:

1. frame.getContentPane
   
   (
   
   )
   
   .add
   
   (
   
   label1)
   
   ;
   
2. frame.getContentPane
   
   (
   
   )
   
   .add
   
   (
   
   label2)
   
   ;
   
3. frame.getContentPane
   
   (
   
   )
   
   .add
   
   (
   
   label3)
   
   ;
   
4. frame.getContentPane
   
   (
   
   )
   
   .add
   
   (
   
   label4)
   
   ;
   
5. frame.getContentPane
   
   (
   
   )
   
   .add
   
   (
   
   label5)
   
   ;
   

5. Lastly, set the size, visibility, and the close operation of the frame. Have also the FlowLayout as the layout manager of the frame. Have this code below:

1. frame.setSize
   
   (
   
   300
   
   , 300
   
   )
   
   ;
   
2. frame.setVisible
   
   (
   
   true
   
   )
   
   ;
   
3. frame.setDefaultCloseOperation
   
   (
   
   JFrame
   
   .EXIT_ON_CLOSE
   
   )
   
   ;
   
4. frame.getContentPane
   
   (
   
   )
   
   .setLayout
   
   (
   
   new
   
   FlowLayout
   
   (
   
   )
   
   )
   
   ;
   

Output:

Here's the full code of this tutorial:

1. import
   
   java.awt.*
   
   ;
   
   // used to access the FlowLayout Class
   
2. import
   
   javax.swing.*
   
   ;
   
   //used to access the JFrame and JLabel class
   
3. 
   
4. 
   
5. public
   
   class
   
   jLabelComponent {
   
6. 
   
7. public
   
   static
   
   void
   
   main(
   
   String
   
   [
   
   ]
   
   args)
   
   {
   
8. JFrame
   
   frame =
   
   new
   
   JFrame
   
   (
   
   "JLabel Component"
   
   )
   
   ;
   
9. 
   
10. JLabel
    
    label1 =
    
    new
    
    JLabel
    
    (
    
    "Student ID:"
    
    , JLabel
    
    .LEFT
    
    )
    
    ;
    
11. JLabel
    
    label2 =
    
    new
    
    JLabel
    
    (
    
    "First Name:"
    
    , JLabel
    
    .RIGHT
    
    )
    
    ;
    
12. JLabel
    
    label3 =
    
    new
    
    JLabel
    
    (
    
    "Last Name:"
    
    , JLabel
    
    .RIGHT
    
    )
    
    ;
    
13. JLabel
    
    label4 =
    
    new
    
    JLabel
    
    (
    
    "Age:"
    
    , JLabel
    
    .LEFT
    
    )
    
    ;
    
14. JLabel
    
    label5 =
    
    new
    
    JLabel
    
    (
    
    "Student Information"
    
    , JLabel
    
    .CENTER
    
    )
    
    ;
    
15. 
    
16. label5.setVerticalAlignment
    
    (
    
    JLabel
    
    .CENTER
    
    )
    
    ;
    
17. label5.setToolTipText
    
    (
    
    "This is a label!"
    
    )
    
    ;
    
18. 
    
19. frame.getContentPane
    
    (
    
    )
    
    .add
    
    (
    
    label1)
    
    ;
    
20. frame.getContentPane
    
    (
    
    )
    
    .add
    
    (
    
    label2)
    
    ;
    
21. frame.getContentPane
    
    (
    
    )
    
    .add
    
    (
    
    label3)
    
    ;
    
22. frame.getContentPane
    
    (
    
    )
    
    .add
    
    (
    
    label4)
    
    ;
    
23. frame.getContentPane
    
    (
    
    )
    
    .add
    
    (
    
    label5)
    
    ;
    
24. 
    
25. frame.setSize
    
    (
    
    300
    
    , 300
    
    )
    
    ;
    
26. frame.setVisible
    
    (
    
    true
    
    )
    
    ;
    
27. frame.setDefaultCloseOperation
    
    (
    
    JFrame
    
    .EXIT_ON_CLOSE
    
    )
    
    ;
    
28. frame.getContentPane
    
    (
    
    )
    
    .setLayout
    
    (
    
    new
    
    FlowLayout
    
    (
    
    )
    
    )
    
    ;
    
29. }
    
30. }
    

For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below.

Best Regards,

Engr. Lyndon Bermoy
IT Instructor/System Developer/Android Developer/Freelance Programmer
Mobile: 09488225971
Landline: 826-9296
E-mail:[email protected]

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