十七、Java中数组常见的几种排序方法！

        // 3种定义方式
        int[] arr = new int[5];

        int[] arr1 = {1,2,3,4,5};

        int[] nums = new int[]{1, 2, 3};
        
        long[] arr2 = new long[6];
        
        String[] strs = new String[5];
        
        // 数组可以存储引用类型
        Person[] ps = new Person[5];

        int[] arr = {45, 34, 53, 43};
        // 默认升序排序
        Arrays.sort(arr);
        System.out.println(Arrays.toString(arr));
        
        // 二分搜索法(使用之前需要先排序)
        int i = Arrays.binarySearch(arr, 34);
        System.out.println(i);
        int[] newArr = Arrays.copyOf(arr, 7);
        int[] newArr1 = Arrays.copyOfRange(arr, 1, 3);
        System.out.println(Arrays.toString(newArr));
        System.out.println(Arrays.toString(newArr1));
        
        int j = Arrays.binarySearch(arr, 1, 3, 34);
        System.out.println(j);

       int[]　arr = {23,12,48,56,45};
　　　　  int temp = -1;
        for(int i=0;i<arr.length;i++) {
            for(int j=i+1;j<arr.length;j++) {
                if(arr[i]>arr[j]) {
                    temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }
        System.out.println(Arrays.toString(arr));

       int[] arr = {23,12,48,56,45};
 　　　　for(int i=0;i<arr.length;i++) {
            int tem = i;
            for(int j=i;j<arr.length;j++) {
                if(arr[j] < arr[tem]) {
                    tem = j;
                }
            }
            int temp1 = arr[i];
            arr[i] = arr[tem];
            arr[tem] = temp1;
        }
        System.out.println(Arrays.toString(arr));

        int[] arr = {23,12,48,56,45};
　　　　for(int i=0;i<arr.length / 2;i++) {
            int temp = arr[i];
            arr[i] = arr[arr.length-i-1];
            arr[arr.length-i-1] = temp;
        }
        System.out.println(Arrays.toString(arr))