SampleOne.java

package com.sample.one;

public class SampleOne {

    public int getSum(int i, int j) {
        if (i == 0) {
            return j;
        } else if (j == 0) {
            return i;
        } else {
            return i + j;
        }
    }

    static class InnerSample {
        private int i;

        public InnerSample(int i) {
            this.i = i;
        }

        public int getSquare() {
            if (this.i < 0) {
                return -1;
            } else {
                return i * i;
            }
        }
    }
}