classTest{publicstaticvoid main(String arg []){//数组的静态声明法//int arr [] = {1,3,5,7,9};//数组的动态声明法int arr []=newint[10];System.out.println("arr[]数组的长度是"+ arr.length);for(int i =0; i < arr.length; i++){System.out.println(arr[i]);}}}classTest{publicstaticvoid main(String arg []){//二维数组的定义方法int arr [][]={{1,2,3},{4,5,6},{7,8}};//动态定义int arrl [][]=newint[3][3];for(int i =0; i < arr.length; i++){for(int j =0; j < arr[i].length; j++){System.out.println(arr[i][j]);}}}}原文：http://www.cnblogs.com/arroneve/p/5815469.html