个人学习日志(3)1.数组变量的声明初始化int[]arr//声明了数组变量arrint[]arr=new int[];//动态初始化int arr1[]=new int[]{1,2,3,4};//动态初始化int arr[]={1,2,3,4};//静态初始化2.输出数组中全部元素int[]arr =new int[]{1,2,3,4};System. out. println(Array.to string(arr));//需要import java. util. Arrays;3.数组的复制int []arr=new int[]{1,2,3,4};int []arr1=Arrays.copyOf(arr,arr.length);System.out.println(Arrays.to string(arr1));输出结果:[1,2,3,4]