Question

We have written the following Class1 class:

class Class1 implements SecretInterface {
    // instance variable
    private int x = 0;

    // constructor
    public Class1(int x) {
        this.x = x;
    }

    // instance methods
    public double myMethod1(double x, double y) {
        return x - y;
    }
    public void myMethod2(int x) {
        System.out.println(x);
    }
    public String myMethod3(String x) {
        return "hi " + x;
    }
}

We have also written the following Class2 class:

class Class2 implements SecretInterface {
    // instance variable
    private int x = 1;

    // constructor
    public Class2(int x) {
        this.x = x;
    }

    // instance methods
    public double myMethod1(double a, double b) {
        return a + b;
    }
    public void myMethod2(double x) {
        System.out.println(x);
    }
    public String myMethod3(Object o) {
        return "hello";
    }
}

TASK: Write the SecretInterface interface such that it contains the most possible attributes/methods possible given the implementations of Class1 and Class2 above.

Answer 1

Answer :

interface SecretInterface{
   double myMethod1(double x,double y);
}

only the myMethod1 is common between the Class1 and Class 2

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