第1个回答 2017-10-13
在java中数组被看成是一个对象
在定义数组时,有两种定义方法:int[] a 和int a[];第二种是C/C++对数组定义方式,对于JAVA建议采用第一种定义方式。
1 一维数组的定义
//定义包含三个元素的一维数组
int[] a = new int[3]; a = {1,2,3};//方法1,先new对象,然后赋值
int[] b = {1,2,3}; //方法2,直接赋值
int[] c = new int[]{1,2,3}; //方法3,new后直接赋值,注意不能制定长度
javascript中: String s = new Array("a","b"); 或者 String s = ["a","b"]; 或者 String s = new Array(); s.push("a");s.push("b");
注意:如果用new定义数组时,必须指定其维度,这样定义是错误的: int[] d = new int[];
如果无法确定其元素个数,可以这样定义:int[] e = {};
这样也是错误的: int[] c = new int[3]{1,2,3}; 因为初始化时候已经赋值为0;只能为
int[] c = new int[]{1,2,3};
2 二维数组的定义
//定义一个3行5列的二维数组
int[][] a = new int[3][5];
a = {{"a","a","a","a","a"}, {"b","b","b","b","b"}, {"c","c","c","c","c"} }; //方法1
int[][] b = {
{"a","a","a","a","a"},
{"b","b","b","b","b"},
{"c","c","c","c","c"}本回答被提问者采纳