Arrays工具类的常用方法

 1  public static void main(String[] args) {
 2         //1.数组复制
 3         int[] a = {10,33,28,22,55,78};
 4         int[] ints = Arrays.copyOfRange(a, 0, 3);
 5         for (int anInt : ints) {
 6             System.out.println(anInt);
 7         }
 8         //2.数组排序
 9         Arrays.sort(a);
10         //3.数组转字符串
11         System.out.println(Arrays.toString(a));
12         //4.数组二分查找,查找之前要先进行排序
13         System.out.println(Arrays.binarySearch(a,55));
14         //5.判断数组是不是相等
15         int[] b = {10,33,28,22,55,99};
16         System.out.println(Arrays.equals(a,b));
17         //6.数组填充
18         int[] c = new int[10];
19         Arrays.fill(c,5);
20         System.out.println(Arrays.toString(c));
21 
22     }