Static blocks in Java - Mini Project: Build & Apply

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Understanding Static Blocks in Java

📖 Scenario: Imagine you are creating a simple Java program that needs to initialize some settings before anything else runs. Static blocks help you set up these settings once when the program starts.

🎯 Goal: You will create a Java class with a static block that prints a message when the class loads, then create a main method to show how static blocks work.

📋 What You'll Learn

Create a class called Setup

Add a static block inside the Setup class that prints "Static block executed"

Add a main method inside the Setup class that prints "Main method executed"

Run the program to see the order of output

💡 Why This Matters

🌍 Real World

Static blocks are used to initialize resources or settings once when a program or class starts, like loading configuration or setting up connections.

💼 Career

Understanding static blocks helps in Java programming jobs where initialization and class loading behavior matter, such as backend development or system programming.

1

Create the Setup class

Write a public class called Setup with no content inside yet.

Java

public class Setup {
    // Your code here
}

💡 Need a hint?

Use public class Setup { } to create the class.

2

Add a static block that prints a message

Inside the Setup class, add a static block that prints "Static block executed" using System.out.println.

Java

public class Setup {
    static {
        // Your code here
    }
}

💡 Need a hint?

Use static { System.out.println("Static block executed"); } inside the class.

3

Add the main method that prints a message

Add a public static main method inside the Setup class that prints "Main method executed" using System.out.println.

Java

public class Setup {
    static {
        System.out.println("Static block executed");
    }

    public static void main(String[] args) {
        // Your code here
    }
}

💡 Need a hint?

Use public static void main(String[] args) { System.out.println("Main method executed"); }.

4

Run the program and observe the output

Run the Setup class and print the output to see the order of messages.

Java

public class Setup {
    static {
        System.out.println("Static block executed");
    }

    public static void main(String[] args) {
        System.out.println("Main method executed");
    }
}

// Run the program to see output

💡 Need a hint?

The static block runs first when the class loads, then the main method runs.