Given two sorted arrays merge them into a new array and keep the merged array sorted

MergeSortedArray.java

package kata;

import java.util.Arrays;

/*
 * input1 = { 3, 8, 17, 99}
 * input2 = { 5, 17, 88}
 * output = { 3, 5, 8, 17, 88, 99}
*/
public class MergeSortedArray {

    private static void print(int input[]) {

        if (null == input || input.length == 0) {
            System.out.println("null Or Empry");
            return;
        }

        for (int i = 0; i < input.length; i++) {
            System.out.print(input[i] + " ");
        }
        System.out.println();
    }

    public static int[] mergeArrayWithNewArray(int input1[], int input2[]) {
        int output[] = new int[input1.length + input2.length];
        int p1 = 0, p2 = 0, out = 0;

        while (p1 < input1.length && p2 < input2.length) {
            if (input1[p1] < input2[p2]) {
                output[out++] = input1[p1++];
            }
            else if (input1[p1] == input2[p2]) {
                output[out++] = input1[p1++];
                output[out++] = input2[p2++];
            }
            else {
                // input1[p1] > input2[p2]
                output[out++] = input2[p2++];
            }
        }

        // p1 contains greater value
        while (p1 < input1.length) {
            output[out++] = input1[p1++];
        }

        // on the other hand p2 contains greater numbers
        while (p2 < input2.length) {
            output[out++] = input2[p2++];
        }

        return output;
    }

    /*
     * merge two sorted array array1 and array2 into the array1 (array1 has enough space) 
    */
    public static int[] mergeArray(int input1[], int input2[], int array1Length) {
        int p1 = array1Length-1, p2 = input2.length-1;
        int out = array1Length + input2.length -1;    
        
        while( index1 > 0 && index2>=0 ) {
            if(input1[p1] < input2[p2]) {
                input1[out--] = input2[p2--]; 
            }
            else {
                input1[out--] = input1[p1--];
            }
        }
        
        while(p2>=0) {
            input1[out--] = input2[p2--];
        }
                           
        return input1;
    }
    
    public static void main(String args[]) {

        System.out.println(Arrays.toString(mergeArray(new int[]{}, new int[]{})));

        System.out.println(Arrays.toString(mergeArray(new int[]{3, 8, 17, 99},
                                                      new int[]{5, 17, 88})));

        System.out.println(Arrays.toString(mergeArray(new int[]{},
                                                      new int[]{5, 17, 88})));

        System.out.println(Arrays.toString(mergeArray(new int[]{3, 8, 17},
                                                      new int[]{})));

    }
}