package test8;

import static java.lang.System.out;

public class Test8 {

    private static final Calc[] CALCS = {
        (a, b) -> a + b,
        new Calc() {
            @Override public double calculate(double a, double b) {
                return a - b;
            }
        },
        (a, b) -> a * b,
        (a, b) -> a / b,
        Math::pow
    };

    public static void main(String[] args) throws Exception {
        for (Calc calc : CALCS) {
            Class<? extends Calc> cls = calc.getClass();
            out.println("SimpleName      : " + cls.getSimpleName());
            out.println("isAnonymousClass: " + cls.isAnonymousClass());
            out.println("isSynthetic     : " + cls.isSynthetic());
            out.println(calc.calculate(3, 2));
            out.println();
        }
        out.println(CALCS[4].calculate(5, 2));
    }
}

package test8;

public interface Calc {
    double calculate(double a, double b);
}

SimpleName      : Test8$$Lambda$1/8094942
isAnonymousClass: false
isSynthetic     : true
5.0

SimpleName      : 
isAnonymousClass: true
isSynthetic     : false
1.0

SimpleName      : Test8$$Lambda$2/12251916
isAnonymousClass: false
isSynthetic     : true
6.0

SimpleName      : Test8$$Lambda$3/8460669
isAnonymousClass: false
isSynthetic     : true
1.5

SimpleName      : Test8$$Lambda$4/13921446
isAnonymousClass: false
isSynthetic     : true
9.0

25.0