Java GUI >> Adding ActionListener to TextField and Button

gistfile1.java

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;


public class MyGUI extends JFrame {

        JPanel jp;
	JTextField jt;
	JLabel jl;
	JButton jb;
	public MyGUI(){
		
		setTitle("JTextField Example");
		setSize(400,200);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		
		jp = new JPanel();
		jt = new JTextField(30); //text to appear in the text field, horizontal length
		jl = new JLabel();
		jb = new JButton("Enter");
		
		jt.addActionListener(new ActionListener() { 
			//after adding text to text field, enter will be listened by action listener of text field
			
			public void actionPerformed(ActionEvent e) {
				String input = jt.getText();
				jl.setText(input);
			}
		});
		
		jb.addActionListener(new ActionListener() {
			
			public void actionPerformed(ActionEvent e) {
				String input = jt.getText();
				jl.setText(input);
			}
		});
		
		jp.add(jt);
		jp.add(jb);
		jp.add(jl);
		add(jp);
		
		validate();
	}
	
	public static void main(String [] args) {
		new MyGUI();
	}
	
}