| import
java.awt.*;
import
java.awt.event.*;
import
javax.swing.*;
public
class swing extends JFrame implements ActionListener,ItemListener
{JComboBox
combo=new JComboBox();
JButton btnExit=new
JButton("Exit");
Container cp=getContentPane();
Color c=cp.getBackground();
public swing()
{ setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(null);
combo.addItem("Reset to Default
Color");
combo.addItem("Set background
color to red");
combo.addItem("Set background
color to green");
combo.addItem("Set background
color to blue");
cp.add(combo);
cp.add(btnExit);
btnExit.setBounds(85,120,70,30);
combo.setBounds(20,10,200,30);
combo.addItemListener(this);
btnExit.addActionListener(this);
}
public
void itemStateChanged(ItemEvent e)
{ String
s=(String)e.getItem();
if(s.compareTo("Reset to
Default Color")==0)
cp.setBackground(c);
if(s.compareTo("Set background
color to red")==0)
cp.setBackground(Color.red);
if(s.compareTo("Set background
color to green")==0)
cp.setBackground(Color.green);
if(s.compareTo("Set background
color to blue")==0)
cp.setBackground(Color.blue);
}
public
void actionPerformed(ActionEvent a)
{ String
s=a.getActionCommand();
if(s.equals("Exit"))
System.exit(0);
}
public
static void main(String[]args)
{
swing cd=new swing();
cd.setSize(new Dimension(250,200));
cd.setTitle("A swing
application");
cd.setVisible(true);
}
}
Output
 |
This blog is mainly developed for individuals,who were interested in programming using C,C++,java and SQL.
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here's a simple Java program that illustrates the Swing concept by creating a basic Swing GUI window:
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Copy code
import javax.swing.*;
public class SwingExample {
public static void main(String[] args) {
// Creating the frame
JFrame frame = new JFrame("Swing Example");
// Setting the width and height of frame
frame.setSize(400, 300);
// Setting the layout for the frame
frame.setLayout(null);
// Creating a label
JLabel label = new JLabel("Hello, Swing!");
// Setting the bounds of the label
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// Adding the label to the frame
frame.add(label);
// Setting the frame visibility to true
frame.setVisible(true);
// Setting default close operation for the frame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
This program creates a simple Swing window with a label saying "Hello, Swing!" placed at coordinates (50, 50) within the window. You can further explore Swing by adding components like buttons, text fields, etc., and arranging them using various layout managers provided by Swing.
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