import java.awt.*;
import java.awt.event.*;
public class TFFrame extends Frame {
    TextField num1,num2,num3;
    public void launchFrame(){
        TextField num1=new TextField(10);
        TextField num2=new TextField(10);
        TextField num3=new TextField(15);
        Label lblPlus=new Label("+");
        Button btnEqual=new Button("=");
        btnEqual.addActionListener(new MyMonitor(this));
        setLayout(new FlowLayout());
        add(num1);
        add(lblPlus);
        add(num2);
        add(btnEqual);
        add(num3);
        pack();
        setVisible(true);
    
        }
    }

public class MyMonitor implements ActionListener{
    TextField num1,num2,num3;
    /*public MyMonitor(TextField num1,TextField num2,TextField num3)
    {
        this.num1=num1;
        this.num2=num2;
        this.num3=num3;
    }*/
    TFFrame tf=null;
    public MyMonitor(TFFrame tf){
        this.tf=tf;    }
    public void actionPerformed(ActionEvent e){
        int n1=Integer.parseInt(tf.num1.getText());
        int n2=Integer.parseInt(tf.num2.getText());
        tf.num3.setText(""+(n1+n2));
        
    }
    }
public class TFFtest {
public static void main(String[] args){
    new TFFrame().launchFrame();
}
}

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