Java数组的使用详细

package com.liming.array;

public class ArrayTest {
    public static void main(String[] args) {
        /**方式一:直接使用列表初始化，不使用类型声明*/
        int[] aa1 = {123,123,123,123};
        String[] ss1 = {"abc","abc","abc"};
        /**方式二：使用列表初始化，使用类型声明,并使用new关键字*/
        int[] aa2 = new int[]{123,123,123,123};
        String[] ss2 = new String[]{"abc","abc","abc"};
        /**方式三：直接赋值*/
        int[] aa3 = new int[3]; //不初始化数组
        int[] aa33 = new int[0];//这是一个空数组
        /**方式四：列表赋一个空值*/
        int[] aa4 = {};
        int[] aa44 = null;
        /**方式五：多维数组直接赋值*/
        String[][] ss5 = {new String[]{},new String[]{}};//数组内赋值数组 空赋值
        String[][] ss55 = {{},{}};  //空值
        String[][] ss555 = {null,null}; //空值
        String[][] ss5555 = {new String[5],new String[5]};
        /**方式六：多维数组成员数组赋值*/
        String[][] ss6 = {new String[]{"def","def","def"},new String[]{"abc","abc","abc"}};
        String[][] ss66 = {new String[3],new String[3]};
        ss66[0][1] = "Hello,World";
        /**方式七：多维数组赋值*/
        String[][] ss7 = new String[3][3];
        ss7[0] = new String[]{};
        ss7[1] = new String[]{"qwe","rty","zxc","kkk","jjj"};//更改了ss7数组之前的结构
        ss7[2] = new String[]{"abc","def","hij"};
        ss7[2][2] = "Hell Door";
        /**方式八：三维数组赋值*/
        String[][][] ss8 = new String[4][3][3];
        ss8[0] = new String[][]{};
        ss8[1] = new String[3][3];
        ss8[2] = new String[][]{new String[2],new String[2],new String[2]};
        ss8[2][1] = new String[]{"abc","abc","abc"};
        ss8[3] = new String[][]{new String[]{"aaa","bbb","ccc"},new String[]{"ddd","eee","fff"}};
        /**方式九：四维数组赋值*/
        String[][][][] ss9 = new String[][][][]{};
        String[][][][] ss99 = new String[][][][]{new String[][][]{new String[][]{new String[]{"Helo"}}}};
        String[][][][] ss999 = new String[4][4][4][4];
        ss999[0] = new String[][][]{new String[][]{new String[]{"这是什么鬼"}}};
        ss999[1] = new String[3][3][3];//改变了数组之前的结构
        ss999[1][2][2][2] = "四维数组的演示";

        System.out.println(ss999[1][2][2][2]);

    }
}