public class TextField extends TextComponent

import java.awt.*;
class TextFieldExample{
public static void main(String args[]){
    Frame f= new Frame("TextField Example");
    TextField t1,t2;
    t1=new TextField("Welcome to Javatpoint.");
    t1.setBounds(50,100, 200,30);
    t2=new TextField("AWT Tutorial");
    t2.setBounds(50,150, 200,30);
    f.add(t1); f.add(t2);
    f.setSize(400,400);
    f.setLayout(null);
    f.setVisible(true);
}
}

import java.awt.*;
import java.awt.event.*;
public class TextFieldExample extends Frame implements ActionListener{
TextField tf1,tf2,tf3;
Button b1,b2;
TextFieldExample(){
tf1=new TextField();
tf1.setBounds(50,50,150,20);
tf2=new TextField();
tf2.setBounds(50,100,150,20);
tf3=new TextField();
tf3.setBounds(50,150,150,20);
tf3.setEditable(false);
b1=new Button("+");
b1.setBounds(50,200,50,50);
b2=new Button("-");
b2.setBounds(120,200,50,50);
b1.addActionListener(this);
b2.addActionListener(this);
add(tf1);add(tf2);add(tf3);add(b1);add(b2);
setSize(300,300);
setLayout(null);
setVisible(true);
}
public void actionPerformed(ActionEvent e) {
String s1=tf1.getText();
String s2=tf2.getText();
int a=Integer.parseInt(s1);
int b=Integer.parseInt(s2);
int c=0;
if(e.getSource()==b1){
c=a+b;
}else if(e.getSource()==b2){
c=a-b;
}
String result=String.valueOf(c);
tf3.setText(result);
}
public static void main(String[] args) {
new TextFieldExample();
}
}