Java之数组在指定位置插入元素实现

public class InsertArray {
 
	public static void main(String[] args) {
		int index = 2;
		int value = 5;
		int[] array = new int[]{1,2,3,4};
		array[index] = value;
		System.out.println(Arrays.toString(array));
	}
 
}

public class InsertArray {
 
	public static void main(String[] args) {
		int index = 2;
		int value = 5;
		int[] array = new int[]{1,2,3,4};
		int[] newArray = new int[array.length + 1];
		for (int i = 0; i < array.length; i++) {
			newArray[i] = array[i];
		}
		for (int i = newArray.length - 1; i > index; i--) {
			newArray[i] = newArray[i - 1];
		}
		newArray[index] = value;
		array = newArray;
		System.out.println(Arrays.toString(array));
	}
 
}