Create a GPA Calculator in Java - Full Tutorial with Source

Full source code for this GPA Calculator here:

Building a full GPA calculator in Java! Starting from scratch, beginning to end, and coding live in this full lesson!

Learn or improve your Java by watching it being coded live!

Hey, I'm John! I'm a Lead Java Software Engineer who has been in the industry for over a decade.

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[paulus_germanus]

This is the best conding related channel I've ever stumbled upon, bro! Hat's off! Keep em coming!! <3

[skccharan]

Good interview tip 31:22, thank you... Its cool to know that this is your first video every....☺

[mayorfred]

I learned a lot from this video thanks for the clear presentation

[TheWalace]

Congratulations on the video. I'm from Brazil, I'll watch all your videos :)

[bigd]

Really loved the video..if you could do one to make GUI GPA calculator..now that that would be awesome

[TheRealAnkitSharma]

This was fun.
Can we make it into a GUI type of calculator too?

[MOHSINKHAN-fvkk]

great work .sir kindly make its GUI as soon as possible thanks

[chilli]

Love your videos ! Why do we need to create a variable creditString but not set that as Interger at the first place ? Is it to allow us to use parseInt in the try...catch block ? Thanks

[enriquepasa]

32:06 code " 1 1A 2B " is a cool reference of self-destruct sequence 2 code of the USS Enterprise from Star Trek (the golden age of great movies)

[austin]

I like the video.
It’d be great if you could provide a link to download the code.
I’m too slow to keep up with you in real time 😂

[randykarl]

thank you for the video! May i ask if youre able to do a tutorial on GUI based cgpa calculator?

[butterscotch_]

Why are you using a wrapper class, Integer? Why not just use int?

[lethality]

does it matter what build system I choose? IntelliJ, Maven, Gradle

[RudyJayson]

System.out.printf("gpa: %.2f", gpa);

[walterwhite]

import java.awt.*;

import javax.swing.*;

public class File {
public static void main(String[] args) {

//
// 1.frame add

JFrame f =new JFrame();

f.setTitle("CalCulator");
f.setSize(350, 400);


f.setLayout(null);


//2.add 3 panels

JPanel p1=new JPanel();
p1.setBounds(0, 0, 350, 50);


JPanel p2=new JPanel();
p2.setBounds(0, 50, 200, 350);



JPanel p3=new JPanel();
p3.setBounds(200, 50, 150, 350);


f.add(p1);
f.add(p2);
f.add(p3);



//3.txtfield add in panel 1

JTextField txt = new JTextField();
txt.setBounds(10, 10, 120, 100);

p1.add(txt);



//4. grid in panel2


JButton btn1 = new JButton("1");
JButton btn2 = new JButton("2");
JButton btn3 = new JButton("3");
JButton btn4 = new JButton("4");
JButton btn5 = new JButton("5");
JButton btn6 = new JButton("6");
JButton btn7 = new JButton("7");
JButton btn8 = new JButton("8");
JButton btn9 = new JButton("9");

p2.add(btn1);
p2.add(btn2);
p2.add(btn3);
p2.add(btn4);
p2.add(btn5);
p2.add(btn6);
p2.add(btn7);
p2.add(btn8);
p2.add(btn9);

p2.setLayout(new GridLayout(3, 3));


//5. extra buttons in panel 3

JButton b1 = new JButton("+");
JButton b2 = new JButton("-");
JButton b3 = new JButton("*");
JButton b4 = new JButton("/");


p3.add(b1);
p3.add(b2);
p3.add(b3);
p3.add(b4);

p3.setLayout(new FlowLayout(FlowLayout.LEFT, 50, 25));


f.setVisible(true);




}

}