SubClass2.java

import java.util.Objects;

public class SubClass2 extends AClass {
	public static void main(String[] args) {
		System.out.println(new SubClass2(6).getValue1());
	}

	public SubClass2(int value) {
		super(new MyCalculation(value));
	}

	private static class MyCalculation implements ICalc {
		private int value;

		public MyCalculation(int value) {
			this.value = value;
		}

		@Override
		public int getValue() {
			return value + 10;
		}
	}
}

abstract class AClass {
	private final int value1;

	public AClass(ICalc calc) {
		this.value1 = Objects.requireNonNull(calc.getValue());
	}

	public final int getValue1() {
		return value1;
	}
}

interface ICalc {
	int getValue();
}