[Solved] Find the problem in this code snippet related to data hiding:class Car { private int speed; public void setSpeed(int speed) { speed = speed; } public int getSpeed() { return speed; } } | Java

Java - Encapsulation

Find the problem in this code snippet related to data hiding:

class Car {
  private int speed;
  public void setSpeed(int speed) {
    speed = speed;
  }
  public int getSpeed() {
    return speed;
  }
}

ANo problem, code works fine

BGetter should return parameter speed

CPrivate variable should be public

DSetter does not update the private variable

Step-by-Step Solution

Solution:

Step 1: Check setter method
Setter assigns parameter speed to itself, not to instance variable.
Step 2: Correct usage
Must use 'this.speed = speed;' to update private variable.
Final Answer:
Setter does not update the private variable -> Option D
Quick Check:
Setter must update instance variable [OK]

Quick Trick: Use 'this' to refer to instance variable in setters [OK]

Common Mistakes:

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Find the problem in this code snippet related to data hiding: