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

Java - Encapsulation

Identify the error in the following code related to encapsulation:

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

AThe balance variable should be public

BThe getter method should be private

CThe setter method does not update the class variable correctly

DThe setter method should return a value

Step-by-Step Solution

Solution:

Step 1: Analyze the setter method
The setter uses balance = balance; which assigns the parameter to itself, not the class variable.
Step 2: Understand correct assignment
To update the class variable, use this.balance = balance; to refer to the instance variable.
Final Answer:
The setter method does not update the class variable correctly -> Option C
Quick Check:
Use 'this' to assign parameter to instance variable [OK]

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

Common Mistakes:

Forgetting 'this' keyword in setter
Making getter private which breaks access
Expecting setter to return a value

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Identify the error in the following code related to encapsulation:

Step 1: Analyze the setter method

Step 2: Understand correct assignment

Final Answer:

Quick Check:

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