import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class FrameBase extends JFrame implements ActionListener{
JButton calc, clear;
JTextField score;
JTextField grade;
Container con;
public FrameBase(){
calc = new JButton("Calculate Grade");
clear = new JButton("Reset");
calc.addActionListener(this);
clear.addActionListener(this);
score = new JTextField("00");
grade = new JTextField("Grade appers here");
con = this.getContentPane();
con.setLayout(new FlowLayout());
con.add(calc);
con.add(score);
con.add(grade);
con.add(clear);
this.setSize(300, 400);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
int sc;
String t = "Your grade is: ";
if(e.getSource() == calc){
sc = Integer.parseInt(score.getText());
System.out.println("We are in Action "+sc);
if(sc>89)t = t +"A";
else if(sc>79)t = t + "B";
else if(sc>59)t = t + "C";
else if(sc>49)t = t + "D";
else t = t + "F";
grade.setText(t);
}
else {
score.setText("00");
grade.setText("Sart again.. ");
}
}
public static void main(String arg[]){
System.out.println("Hello World");
new FrameBase();
}
}