Download swing

SWING:
Swing library is an official Java GUI toolkit released by Sun Microsystems. It is
used to create Graphical user interfaces with Java.
The main characteristics of the Swing toolkit
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platform independent
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configurable
 lightweight 
The Swing API has 18 public packages:
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javax.accessibility
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javax.swing.tree
javax.swing.undo
Swing is an advanced GUI toolkit. It has a rich set of widgets. From basic widgets like
buttons, labels, scrollbars to advanced widgets like trees and tables. Swing itself is written
in Java.
Swing is a part of JFC, Java Foundation Classes. It is a collection of packages for creating
full featured desktop applications. JFC consists of AWT, Swing, Accessibility, Java 2D,
and Drag and Drop. Swing was released in 1997 with JDK 1.2. It is a mature toolkit. The
Java platform has Java2D library, which enables developers to create advanced 2D
graphics and imaging. There are basically two types of widget toolkits.
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Lightweight 
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Heavyweight
There is also another GUI library for the Java programming language. It is called SWT.
The Standard widget toolkit. The SWT library was initially developed by the IBM
corporation. Now it is an open source project maintained by the Eclipse community. The
SWT is an example of a heavyweight toolkit. It lets the underlying OS to create GUI. SWT
uses the java native interface to do the job.
Swing Packages
javax.swing
The high level swing package primarily consists of components, adapters,
default component models and interfaces for all the delegates and models.
javax.swing.border
The border package declares the Border interface and classes, which define specific
border rendering styles.
javax.swing.plaf
The plaf package contains the Pluggable Look-and-Feel API for developers interested
in defining custom interfaces.
javax.swing.table
The table package contains the interfaces and classes, which support the Swing
table component.
javax.swing.text
The text package contains the support classes for the Swing
document framework. javax.swing.text.html
The text.html package contains the support classes for a basic HTML renderer.
javax.swing.undo
The undo package provides the support classes for implementing
undo/redo capabilities in a GUI.
javax.accessibility
The JFC Accessibility package is included with Swing and available for testing.
Widgets
This section describes how to use the various Swing widgets. Part of the
component hierarchy looks similar to AWT.
here are over double the number of components in Swing than in AWT. This second set of
components is what most appeals to developers, as it provides a much richer set of widgets to
use.
Program
Calculator Program Applet
import
import
import
import
javax.swing.*;
java.awt.event.*;
java.awt.FlowLayout;
java.awt.BorderLayout;
public class CalcProgram extends JFrame implements ActionListener
{
JTextField num1 = new JTextField("0.00"); JTextField num2 = new
JTextField("0.00"); JLabel answer = new JLabel("0.00"); JLabel symbol = new
JLabel("+");
JLabel equals = new JLabel("="); JButton addButton = new JButton(" + ");
JButton subButton = new JButton(" - "); public CalcProgram()
{
JPanel fields = new JPanel(new FlowLayout()); fields.add(num1);
fields.add(symbol); fields.add(num2); fields.add(equals); fields.add(answer);
JPanel buttons = new JPanel(new FlowLayout()); buttons.add(addButton);
buttons.add(subButton);
getContentPane().setLayout(new BorderLayout()); getContentPane().add("North", fields);
getContentPane().add("Center", buttons);
addButton.addActionListener(this);
subButton.addActionListener(this);
pack();
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
double
x
=
Double.parseDouble(num1.getText());
double
Double.parseDouble(num2.getText()); if (e.getSource() == addButton)
{
answer.setText(String.valueOf( x + y )); symbol.setText("+");
}
if (e.getSource() == subButton)
{
answer.setText(String.valueOf( x - y )); symbol.setText("-");
}
}
public static void main(String args[])
{
CalcProgram c = new CalcProgram();
}
}
y
=