aston-java-homework/first-part/hw-01/src/MutableClass.java

class MutableClass {
  MutableClass(int value) {
    this.setValue(value);
  }

  // Конструктор копирования
  public MutableClass(MutableClass other) {
    this.value = other.value;
  }

  public int getValue() {
    return value;
  }

  public void setValue(int value) {
    this.value = value;
  }

  private int value;
}