Java 字符串排序错误

Question

我正在尝试读取字符串并对它们进行排序。我收到了许多错误，这些错误在下面的代码中标有星号。你能告诉我如何修复这些错误吗？

package hw05;

/*
Demonstrates selectionSort on an array of strings.
*/
import java.util.Scanner;

public class Strings {
    // --------------------------------------------
    // Reads in an array of strings, sorts them,
    // then prints them in sorted order.
    // --------------------------------------------
    public static void main(String[] args) {

        String[] stringList;
        String size;

        Scanner scan = new Scanner(System.in);

        System.out.print("\nHow many strings do you want to sort? ");
        size = scan.nextLine();
        **stringList = new String[size];**

        System.out.println("\nEnter the strings...");
        **for (String i = 0; i < size; i++)
            stringList[i] = scan.nextLine();**
        Sorting.selectionSort(stringList);

        System.out.println("\nYour strings in sorted order...");
        **for (String i = 0; i < size; i++)
            System.out.print(stringList[i] + " ");**
        System.out.println();

    }
}

Answer 1

stringList = new String[size];

大小应该是int而不是String。您需要执行如下操作:

int sizeInInt = Integer.valueOf(size); // This may throw NumberFormatException, wrap it in try/catch.

stringList = new String[sizeInInt ];

(或)

将大小更改为 int 并执行 nextInt() 而不是 nextLine()

我建议在执行 nextInt() (或)nextLine() 之前先执行 hasNext()，否则您可能会得到 NoSuchElementException。