Java Topic Practice

Object State and Encapsulation

Practice mode with 15 Java-focused questions, immediate answer checks, and explanations.

For practice use only.

Object State and Encapsulation MCQ Practice

Object State and Encapsulation Java practice with 15 questions, code tracing, and a worked explanation for every answer.

Question 1 of 15

Answered 0 of 15

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Code Tracing 01 - Object State and Encapsulation: track the final printed value.

public class Main {
  public static void main(String[] args) {
    Counter c = new Counter(18);
    c.bump(3);
    c.bump(-3);
    c.bump(3);
    System.out.print(c.getValue());
  }
}
class Counter {
  private int value;
  public Counter(int start) { value = start; }
  public void bump(int amount) { value += amount; }
  public int getValue() { return value; }
}

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