D.Tech Academic: Multithreading in java with swing GUI

1. Multithreading Example using java Swing using inner class

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import javax.swing.JLabel;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Hello extends JFrame {

private JPanel contentPane;

/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					Hello frame = new Hello();
					frame.setVisible(true);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

/**
	 * Create the frame.
	 */
	JLabel l1, l2;

public Hello() {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);

JButton btnStrat = new JButton("Start");

btnStrat.setBounds(166, 208, 89, 23);
		contentPane.add(btnStrat);

l1 = new JLabel("New label");
		l1.setBounds(41, 73, 48, 14);
		contentPane.add(l1);

l2 = new JLabel("New label");
		l2.setBounds(324, 73, 48, 14);
		contentPane.add(l2);

btnStrat.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Resource r = new Resource();
				new Monika(r).start();
				new Shubham(r).start();

}
		});
	}

class Resource {
		public  void print(JLabel l) {
			for (int i = 1; i <= 10; i++) {
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				l.setText(String.valueOf(i));
			}
		}
	}

class Monika extends Thread {
		Resource r;
		public Monika(Resource r) {
		this.r=r;
		}
		@Override
		public void run() {
			r.print(l1);

}
	}

class Shubham extends Thread {
		Resource r;
		public Shubham(Resource r) {
		this.r=r;
		}
		@Override
		public void run() {
			r.print(l2);

}
	}
}

2. Multithreading Example using java Swing using Anonymous Inner class

import java.awt.BorderLayout;
import java.awt.EventQueue;

public class Hello extends JFrame {

private JPanel contentPane;

/**
	 * Create the frame.
	 */
	JLabel l1, l2;

JButton btnStrat = new JButton("Start");

btnStrat.setBounds(166, 208, 89, 23);
		contentPane.add(btnStrat);

l1 = new JLabel("New label");
		l1.setBounds(41, 73, 48, 14);
		contentPane.add(l1);

l2 = new JLabel("New label");
		l2.setBounds(324, 73, 48, 14);
		contentPane.add(l2);

btnStrat.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Resource r = new Resource();
				Thread monika=new Thread() {
					@Override
					public void run() {
						r.print(l1);
					}

};
				Thread shubham=new Thread() {
					@Override
					public void run() {
						r.print(l2);
					}
				};
				monika.start();
				shubham.start();

}
		});
	}

}

3. Multithreading Example using java Swing using Lambda Expression

import java.awt.BorderLayout;
import java.awt.EventQueue;

public class Hello extends JFrame {

private JPanel contentPane;

/**
	 * Create the frame.
	 */
	JLabel l1, l2;

JButton btnStrat = new JButton("Start");

btnStrat.setBounds(166, 208, 89, 23);
		contentPane.add(btnStrat);

l1 = new JLabel("New label");
		l1.setBounds(41, 73, 48, 14);
		contentPane.add(l1);

l2 = new JLabel("New label");
		l2.setBounds(324, 73, 48, 14);
		contentPane.add(l2);

btnStrat.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				Resource r = new Resource();
				Runnable r1=()->r.print(l1);
				Runnable r2=()->r.print(l2);
				
				new Thread(r1).start();
				new Thread(r2).start();

}
		});
	}

}

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Multithreading in java with swing GUI

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