Advanced use of one-dimensional arrays in Java

Advanced use of one-dimensional arrays

Inversion of array

1. Turn an int type array int[] array = {1,2,3,4,5,6} into {6,5,4,3,2,1}

Show some below 内联代码片.

// 一维数组的逆置
		int[] array = {1,2,3,4,5,6};
		int len = array.length;
		for (int i = 0; i < array.length/2; i++) {
			int temp = array[i];//定义中间变量用于存储遍历出的元素
			array[i] = array[len-i-1];//逆置的原理就是将相对位置上的元素交换位置
			array[len-i-1] = temp;
		}
		//在用一个for循环把交换位置的元素遍历一遍
		for (int j = 0; j < array.length; j++) {
			System.out.println(array[j]);
		}

The print result is as follows

2. Copy an int type array int[] array = {1,2,3,4,5,6} to another array

Show some below 内联代码片.

// A code block
		int[] array = {1,2,3,4,5,6};
		int len = array.length;
		//新建一个动态数组用于存储复制的数组
		//需要注意的是两个数组的大小需一样
		int[] array1 = new int[len];
		for (int i = 0; i < array1.length; i++) {
			array1[i] = array[i];
			System.out.print(array1[i]+" ");
		}
	

// 打印结果如下
1 2 3 4 5 6