Notes

package event;

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

import java.awt.event.*;
import java.awt.*;

public class CalHiih extends JFrame implements ActionListener {
private JButton b1;
private JTextField tf1, tf2;
private JLabel lb1, lb2, lb3;


public CalHiih() {
lb1= new JLabel("too 1:");
lb1.setBounds(40, 40, 80,30);

lb2= new JLabel("too 2:");
lb2.setBounds(40, 80, 80,30);
//lb1.setForeground(Color.red);

lb3= new JLabel("hariu ");
lb3.setBounds(130, 160, 120,30);

tf1= new JTextField();
tf1.setBounds(130, 40, 120, 30);

tf2= new JTextField();
tf2.setBounds(130, 80, 120, 30);

b1= new JButton("add");
b1.setBounds(130, 120, 120, 30);
b1.addActionListener(this);

this.add(lb1);
this.add(lb2);
this.add(lb3);
this.add(b1);
this.add(tf1);
this.add(tf2);
this.setSize(400,400);
this.setLayout(null);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}



@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub

if(e.getSource()==b1) {
try {
String t1 = tf1.getText();
String t2 = tf2.getText();
int niilber = Integer.parseInt(t1)+Integer.parseInt(t2);
lb3.setText("Hariu : " +niilber);
}
catch (NumberFormatException n)
{
System.out.println("please enter number");
JOptionPane.showMessageDialog(null, "enter number" );
}
}
}
}
----------------------------------------------------

package event;

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JLabel;
import java.awt.event.*;
import java.awt.*;

public class ActionHiih extends JFrame implements ActionListener {
private JButton b1;
private JButton b2;
private JTextField tf;
private JLabel lb1;
int i=0;

public ActionHiih() {
lb1= new JLabel("Txt");
lb1.setBounds(40, 90, 100,30);
lb1.setForeground(Color.red);

tf= new JTextField();
tf.setBounds(150, 50, 120, 30);

b1= new JButton("click");
b1.setBounds(40, 50, 100, 30);
b1.addActionListener(this);

b2= new JButton ("clear");
b2.setBounds(40, 130, 100, 30);
b2.addActionListener(this);

this.add(lb1);
this.add(b1);
this.add(b2);
this.add(tf);
this.setSize(400,400);
this.setLayout(null);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (e.getSource()==b1) {
String txt = tf.getText();
lb1.setText(txt);
}
if (e.getSource()==b2) {


lb1.setText("Text");
tf.setText(" ");
}

// if(e.getSource()==b1) {
// System.out.println(b1.getText()+" "+i);
// b1.setText("");
// b1.setText("clicked "+i);
// i++;
}
}
---------------------------------------------

package event;

public class EventHiih {

public static void main(String[] args) {
// TODO Auto-generated method stub
//ActionHiih ah = new ActionHiih();
CalHiih cl= new CalHiih();

}

}