[Solved] Identify the error in this code related to data hiding:class BankAccount { private double balance; public void setBalance(double balance) { balance = balance;... | Java

Java - Encapsulation

Identify the error in this code related to data hiding:

class BankAccount {
  private double balance;
  public void setBalance(double balance) {
    balance = balance;
  }
  public double getBalance() {
    return balance;
  }
}

AThe setter method does not update the private variable

BThe getter method should be private

CThe balance variable should be public

DThe class should not have a setter method

Step-by-Step Solution

Solution:

Step 1: Analyze setter method
The setter uses balance = balance; which assigns the parameter to itself, not the class variable.
Step 2: Identify correct assignment
It should use this.balance = balance; to update the private variable.
Final Answer:
The setter method does not update the private variable -> Option A
Quick Check:
Setter must update class variable using 'this' [OK]

Quick Trick: Use 'this' to assign parameter to class variable [OK]

Common Mistakes:

Forgetting 'this' keyword in setter
Making getter private by mistake
Changing variable access to public unnecessarily

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More Java Quizzes

Identify the error in this code related to data hiding:

Step 1: Analyze setter method

Step 2: Identify correct assignment

Final Answer:

Quick Check:

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