Java NetBeans Tutorial: Create a Passcode Program using JFrame

Описание: Learn how to create a simple Passcode Program in Java NetBeans using JFrame! 💻
In this step-by-step tutorial, we’ll design a keypad with number buttons (0–9) and make them display numbers on the screen.
When the correct passcode is entered, the program opens a new JFrame — if incorrect, it shows “Incorrect password.”

🎯 What You’ll Learn:
✅ How to use JFrame in Java NetBeans
✅ How to add number buttons (0–9) and display output using setText()
✅ How to check a passcode using if statements
✅ How to connect one JFrame to another
✅ How to handle button click events

Source Code Includes:
label.setText(label.getText() + "1");

and
if (input.equals("1234")) {
new HomeFrame().setVisible(true);
this.dispose();
} else {
lblMessage.setText("Incorrect password!");
}


Ideal For:

ICT / Computer Programming Students

Java Beginners

Teachers demonstrating GUI-based login systems

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