Java Swing is a GUI widget toolkit for Java that builds upon the Abstract Window Toolkit (AWT) to provide a more sophisticated set of GUI components. It includes common widgets like buttons, text fields, labels and menus. Components in Swing are lightweight objects that can be easily rendered on screen. Containers hold and organize other components in a hierarchy. The most commonly used containers are JFrame, JPanel and JWindow. JFrame is Swing's version of a top-level window with options to close or hide. JTextField allows editing single-line text while JLabel displays read-only text. An example program demonstrates adding components like labels, text fields and buttons to a JFrame and handling button click events

1. SWING
Created by – Samyak Jain (MCA/25014/2022)
Abhishek Ahawlat (MCA/25017/2022)
submitted to – Santosh Kumar Sir

2. What is Java Swing?
 Java Swing is a part of Java Foundation Classes(JFC)
that is used to create window-based applications. It is
built on top of AWT(Abstract Window Toolkit) API and
entirely written in Java.
 The javax.swing package provides classes for java swing
API such as
Jbutton,JTextField,JTextArea,JRadioButton,Jcheckbox
,Jmenu,JColorChooser etc.

3. Difference Between AWT and Swing

4. Components and Containers
 The Components class is the superclass of all components.
 Swing components are derived from the JComponent class.
 A Containers is a special type of component that is designed to
hold other components.
 The most commonly used containers are JFrame, JPanel and
Jwindow etc.
Important Method of Component class
• Void add(component c) // used to add swing component to a container
• Void setSize(int width,int height) //use to set the size of the container
• Void setLayout(Layout Manager m) //use to set the Layout
• Void setVisible(Boolean b) //to make the frame visible on the window.

5. Hierarchical Structure of Components

6. JFrame
• An extension of java.awt.Frame class ,it is the Swing’s version of applet.
• JFrame has the option to hide or close the window with the help of
setDefaultCloseOperation(int) method.
• Example: output :
import javax.swing.*;
public class NewClass
{
public static void main(String args[])
{
JFrame jf = new JFrame("Swing Example");
jf.setSize(300,300);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

7. Another way of doing it…
import javax.swing.*;
public class NewClass extends JFrame
{
public NewClass() {};
public NewClass(String s)
{
super(s);
}
public static void main(String args[])
{
NewClass jf = new NewClass("Swing example");
jf.setSize(300,300);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

8. JTextField
The object of a JTextField class is a text component that allows the editing of
a single line text. It inherits JTextComponent class.
JLabel
The object of JLabel class is a component for placing text in a container. It is
used to display a single line of read only text. The text can be changed by an
application but a user cannot edit it directly. It inherits JComponent class.

9. Swing Example
import javax.swing.*;
import java.awt.event.*;
public class NewClass extends JFrame
{
JLabel l1,l2,l3,l4;
JTextField t1, t2;
JButton b1;
public NewClass() {};
public NewClass(String s)
{
super(s);
}
public void setComponents()
{
l1 = new JLabel("Addition of two Numbers ");
l2 = new JLabel("First Number");
l3 = new JLabel("Second Number");
l4 = new JLabel();
t1 = new JTextField();
t2 = new JTextField();

10. b1 = new JButton("Add");
setLayout(null);
l1.setBounds(50,50,200,20);
l2.setBounds(50,80,100,20);
t1.setBounds(150,80,100,20);
l3.setBounds(50,130,100,20);
t2.setBounds(150,130,100,20);
b1.setBounds(80,180,100,20);
l4.setBounds(50,240,200,20);
b1.addActionListener(new Handler());
add(l1);
add(l2);
add(t1);
add(l3);
add(t2);
add(b1);
add(l4);
}

11. class Handler implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
int a = Integer.parseInt(t1.getText());
int b = Integer.parseInt(t2.getText());
int s = a+b;
l3.setText("Result is "+s);
}
}
public static void main(String args[])
{
NewClass jf = new NewClass("Swing example");
jf.setComponents();
jf.setSize(500,500);
jf.setVisible(true);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

12. THANK YOU