如何在不使用导入语句的情况下从 Arrays class 调用方法？

Question

I tried to call this method from the Arrays class without using an import statement: Could u please tell me what´s wrong?

//import java.util.Scanner;

class ArraySorting {
    /**
     * @param array unordered sequence of strings
     * @return ordered array of strings
     */
    public static String[] sortArray(String[] array) {
        // write your code here
        java.util.Arrays.sort  input = new  java.util.Arrays.sort(System.in);
        String string = input.next();
        String[] str = string.split(" ");
        java.util.Arrays.sort (array);
        System.out.println(string.toString(array));
    }
      return (array);
    }
    public static void main(String[] args) {
        sortArray();
    }
}

Thanks alot

Answer 1

The method to sort the array should be cleaned out of the redundant code and has to be as simple as:

public static String[] sortArray(String[] array) {
    java.util.Arrays.sort (array);
    System.out.println(java.util.Arrays.toString(array));
    return array;
}

Next, the test must be rewritten to read a line, split into arrays of strings to be sorted with sortArray :

public static void main(String ... args) {
    java.util.Scanner input = new java.util.Scanner(System.in);
    String string = input.nextLine(); // read entire line not a single token
    String[] str = string.split(" ");
    System.out.println("before sort: " + java.util.Arrays.toString(str));
    String[] sorted = sortArray(str);
    System.out.println("str: " + java.util.Arrays.toString(str));
    System.out.println("sorted: " + java.util.Arrays.toString(str));
}

Online demo

before sort: [abc, aad, 0123, 456, zxy, aabc]
[0123, 456, aabc, aad, abc, zxy]
str: [0123, 456, aabc, aad, abc, zxy]
sorted: [0123, 456, aabc, aad, abc, zxy]

Note: Arrays.sort modifies its input array so actually method sortArray may be void .