Java-Tutorial-for-Beginners-Crash-Course/27 Inheritance.txt at master · Vicky-Raghuwanshi/Java-Tutorial-for-Beginners-Crash-Course · GitHub

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// IS-A, HAS-A

class Calculator      // Super
{
	public int add(int i,int j)
	{
		return i+j;
	}
}


class CalcAdv extends Calculator     // Sub
{
//	public int add(int i,int j)
//	{
//		return i+j;
//	}
	public int sub(int i,int j)
	{
		return i-j;
	}
}

class CalcVeryAdv extends CalcAdv
{
	public int multi(int i,int j)
	{
		return i*j;
	}
}

public class InheritanceDemo
{
	public static void main(String[] args)
	{
		CalcVeryAdv c1 = new CalcVeryAdv();
		int result1 = c1.add(5, 4);
		int result2 = c1.sub(6, 3);
		int result3 = c1.multi(2, 3);

		System.out.println(result1);
		System.out.println(result2);
		System.out.println(result3);
	}