JButtons - Displays six JButtons on a JPanel using JFrame

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Swing buttons are embodied by the JButton class. A Swing button can feature a text label (just like AWT button), an icon label, or a combinataion of both.

The JButton class inherits the AbstractButton class. The AbstractButton class defines the inherent behavior of all Swing buttons.

Constructors of the JButton class include the following:

1. JButton(String) A button with the specified text
2. JButton(Icon) A button with the specified icon.
3. JButton(String,Icon)A button with the specified text and icon.

Example:
The following example creates a button with Click Me as the text on the button.

JButton btnClick=new JButton("Click Me");

Icons can be associated to buttons by creating an object of the ImageIcon class, similar to instantiating an Image object.

The constructor of the ImageIcon class takes a graphic filename or URL as the only argument.

The following table describes some of the methods provided by the JButton class

Methods	Description
boolean isDefaultButton()	Sets to be the default Button.
void updateUI()	Used to Update the look and feel of the program

The following example displays six buttons on a panel using Frames.

/* =========================================================== File Name : MasterForm.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Twitter ID : https://twitter.com/AdvanceJava Created By : Bintu Chaudhary =========================================================== */ import javax.swing.*; import java.awt.event.*; public class MasterForm extends JFrame { public MasterForm() { super("Master Form"); // Creat six object of the JButton class JButton btnInsert = new JButton("Insert"); JButton btnUpdate = new JButton("Update"); JButton btnDelete = new JButton("Delete"); JButton btnView = new JButton("View"); JButton btnPrevious = new JButton("Previous"); JButton btnNext = new JButton("Next"); JPanel pnlMenu = new JPanel(); //Add Buttons to the Panel pnlMenu.add(btnInsert ); pnlMenu.add(btnUpdate); pnlMenu.add(btnDelete); pnlMenu.add(btnView); pnlMenu.add(btnPrevious); pnlMenu.add(btnNext); // Creating Shortcut keys btnInsert.setMnemonic('i'); btnUpdate.setMnemonic('u'); btnDelete.setMnemonic('d'); btnView.setMnemonic('v'); btnPrevious.setMnemonic('p'); btnNext.setMnemonic('n'); // Add Tooltips for each button btnInsert.setToolTipText("To Insert New Records"); btnUpdate.setToolTipText("To Modify Existing Records"); btnDelete.setToolTipText("To Delete Existing Records"); btnView.setToolTipText("To View Existing Records"); btnPrevious.setToolTipText("Go To Previous Record"); btnNext.setToolTipText("Go To Next Record"); setContentPane(pnlMenu); } public static void main(String[] args) { // Calls the MasterForm constructor. MasterForm frmMaster = new MasterForm(); // setSize() method is used to specify the width and height of the frame frmMaster.setSize(500,300); // To display the Frame frmMaster.setVisible(true); WindowListener listener = new WindowAdapter() { public void windowClosing(WindowEvent winEvt) { System.exit(0); } }; // End of WindowAdaptor() method // Window listener activates the windowClosing() method frmMaster.addWindowListener(listener); } }

C:\>jdk1.4\bin>javac MasterForm.java
C:\>jdk1.4\bin>appletviwer MasterForm.java

"Output of MasterForm.class"

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