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Why must parentheses be used when calling a method in Java, even if it has no parameters?

hard📝 Conceptual Q10 of 15
Java - Methods and Code Reusability
Why must parentheses be used when calling a method in Java, even if it has no parameters?
AParentheses are optional and can be omitted
BParentheses are only needed for methods with parameters
CParentheses change the method name internally
DParentheses indicate a method call and distinguish it from a variable
Step-by-Step Solution
Solution:

  1. Step 1: Understand method call syntax

    Parentheses tell Java this is a method call, not a variable or field.

  2. Step 2: Importance of parentheses

    Without parentheses, Java treats the name as a variable, causing errors or confusion.

  3. Final Answer:

    Parentheses indicate a method call and distinguish it from a variable -> Option D

  4. Quick Check:

    Parentheses = method call indicator [OK]
Quick Trick: Parentheses always mark method calls, even empty ones [OK]
Common Mistakes:
  • Thinking parentheses are optional
  • Believing parentheses change method names
  • Using parentheses only for methods with parameters

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