public static void main(String[] args) { int[] array1 = {1,2,3,4,5}; int[] array2 = {6,7,8,9,10}; int[] array3 = {100,200,300,400}; System.out.println("array1 = " + Arrays.toString(array1)); System.out.println("array2 = " + Arrays.toString(array2)); System.out.println("array3 = " + Arrays.toString(array3)); int [] array4 = merge(array1, array2, array3); System.out.println("After Merge of Three arrays are: "); System.out.println("array4 = " + Arrays.toString(array4)); } public static int[] merge(int[] array1, int[] array2, int[] array3) { int[] array4 = new int[array1.length + array2.length + array3.length]; for(int i=0; i<array1.length; i++) { array4[i] = array1[i]; } for(int i=0; i<array2.length; i++) { array4[array1.length + i] = array2[i]; } for(int i=0; i<array3.length; i++) { array4[array1.length + array2.length + i] = array3[i]; } return array4; } //output: