java - 读取字符串数组

Question

我正在尝试读取java中的字符串值集，但我只能读取最多n-1个值，例如，如果字符串数组大小为4，我只能提供3个输入。 这是我的代码。

package my_project;

import java.util.Scanner;

public class ArrayString 
{
    public static void main(String[] args)
    {
        int n;
        String key;
        Scanner sc=new Scanner (System.in);
        System.out.println("Enter the no of courses:");
        n=sc.nextInt();
        if(n<=0)
        {
            System.out.println("Invalid range");
            System.exit(0);
        }
        System.out.println("The available courses are:");
        String [] courses=new String[n];
        for(int i=0;i<n;i++)
        {
            courses[i]=sc.nextLine();
        }
        for(int i=0;i<n;i++)
        {
            if(courses[i].equals("java"))
            {
                System.out.println("course is available ");
                System.exit(0);
            }
        }
    }

}

Answer 1

public static void main(String... args) {
    try (Scanner sc = new Scanner(System.in)) {
        System.out.print("Enter the no of courses: ");
        int n = sc.nextInt();
        sc.nextLine();  // add this to read String after int

        if (n <= 0)
            System.out.println("Invalid range");
        else {
            System.out.println("The available courses are:");
            String[] courses = new String[n];

            for (int i = 0; i < n; i++) {
                System.out.format("#%d: ", i + 1);
                courses[i] = sc.nextLine();
            }

            for (int i = 0; i < n; i++) {
                if ("java".equalsIgnoreCase(courses[i])) {
                    System.out.println("course is available");
                    return;
                }
            }
        }
    }
}