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: