Code of simple Swing Java Applications

//package swing;
import java.awt.*;
import javax.swing.*;
public class Panel1 {
	public static void main(String[] args) {
		JFrame frame = new JFrame("Texts");
		JPanel pane = new JPanel();
		pane.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30));
		JLabel label = new JLabel("This is a Label");
		pane.setLayout(new GridLayout(2, 2));
		pane.add(label);
		pane.setBounds(20, 30, 10, 30);
		frame.getContentPane().add(pane, BorderLayout.CENTER);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setVisible(true);
	}
}

//package swing;
import java.awt.*;
import javax.swing.*;
public class scrollPane {
	public static void main(String[] args) {
		JFrame frame = new JFrame("Scrollpane");
		JPanel pane = new JPanel();
		pane.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30));
      JTextArea myText = new JTextArea("This is an example \n"
      				+  	" swing text area");
		JScrollPane scrollPane = new JScrollPane(myText);
		pane.setLayout(new GridLayout(1, 1));
		pane.add(scrollPane);
		frame.getContentPane().add(pane, BorderLayout.CENTER);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setVisible(true);
	}
}

//package swing;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ButtonApplication {
	private static String labelPrefix =
		                "No. of times button clicked: ";
	private int numClicks  = 0;
	private int numClicks2 = 0;
	public Component createComponents() {
		final JLabel label  = new JLabel(labelPrefix + "0    ");
		final JLabel label2 = new JLabel(labelPrefix + "0    ");
		
		JButton button1 = new JButton("Click me");
		JButton button2 = new JButton("Click me");
		
		button1.setMnemonic('i'); // press alt+i
		button2.setMnemonic('j'); // press alt+j	
			
		button1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				numClicks++;
				label.setText(labelPrefix + numClicks);
			}
		});
		button2.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				numClicks2++;
				label2.setText(labelPrefix + numClicks2);
			}
		});
		label.setLabelFor(button1);
		label.setLabelFor(button2);
		JPanel pane = new JPanel();
		pane.setBorder(BorderFactory.createEmptyBorder(30, //top
		30, //left
		10, //bottom
		30) //right
		);
		pane.setLayout(new GridLayout(2, 2));
		pane.add(button1);
		pane.add(button2);
		pane.add(label);
		pane.add(label2);
		return pane;
	}
	public static void main(String[] args) {
		try {
			UIManager.setLookAndFeel(
			UIManager.getCrossPlatformLookAndFeelClassName());
		} catch (Exception e) {
		}
		//Create the top-level container and add contents to it.
		JFrame frame = new JFrame("SwingApplication");
		ButtonApplication app = new ButtonApplication();
		
		Component contents = app.createComponents();
		frame.getContentPane().add(contents, BorderLayout.CENTER);
		
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setVisible(true);
	}
}