Java Programm for No Variable Initialization Generates Compiler Error

Java Program for No Variable Initialization Generates Compiler Error

In this java code, variables are only declared but not initialized any value to the variables of different data types.

But used non initialized java variables of different data types in print statement and raised the compiler errors during compilation of java code.

class NoInitialization {
	public static void main(String[] args) {
		byte b;
		short s;
		int i;
		long l;
		
		System.out.println(b);
		System.out.println(s);
		System.out.println(i);
		System.out.println(l);
	}
}

NoInitialization.java:8: error: variable b might not have been initialized
                System.out.println(b);

In compiler error, explains that variable might not be initialized.

Java Program with Variable Initialization

Above Java program compilation error can be fixed by initializing the java variables with default value.

class NoInitialization {
	public static void main(String[] args) {
		byte b=1;
		short s=10;
		int i=100;
		long l=1000;
		
		System.out.println(b);
		System.out.println(s);
		System.out.println(i);
		System.out.println(l);
	}
}

1
10
100
1000