Which of the following is not a valid way to declare an integer variable in Java?

Solution (By Examveda Team)

The correct answer is Option B: int y = 3.14.

In Java, when declaring an integer variable, you should assign it an integer value without a decimal point. Option B attempts to assign a double value (3.14) to an int variable, which is not a valid conversion in Java without explicit type casting.

Here's the breakdown:

Option A: int x = 42 - This is a valid way to declare an integer variable in Java, where x is assigned the integer value 42.

Option B: int y = 3.14 - This is not a valid way to declare an integer variable in Java because it attempts to assign a double value (3.14) to an int variable without type casting.

Option C: int z = -10 - This is a valid way to declare an integer variable in Java, where z is assigned the integer value -10.

Option D: int w = 0x1A - This is a valid way to declare an integer variable in Java using hexadecimal notation. w is assigned the integer value 26 in decimal notation.

So, among the provided options, Option B is not a valid way to declare an integer variable in Java because it attempts to assign a double value to an int variable.