Question

我希望它能够打印出来：＆＃34;你的分数是第一个＆＃34;，但它不会。

我使用toString()，我完全是Java的初学者。如果有人有任何想法，请告诉我。

我的代码：

import java.util.*;
public class Person implements Comparable<Person>
{
    String name;
    int age;

    public Person(String name, int i)
    {
        this.name = name;
        this.age = i;
    }

    public String getName()
    {
        return name;
    }

    public int getAge()
    {
        return age;
    }

    public String toString()
    {

        return name + " : " + age;
    }

    /*
    **  Implement the natural order for this class
    */
    public int compareTo(Person p)
    {
        return getName().compareTo(p.getName());
    }

    static class AgeComparator implements Comparator<Person>
    {
        public int compare(Person p1, Person p2)
        {
            int age1 = p1.getAge();
            int age2 = p2.getAge();

            if (age1 == age2)
                return 0;
            else if (age1 > age2)
                return 1;
            else
                return -1;
        }
    }

    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        int pie;
        Scanner input1 = new Scanner(System.in);
        String ass;
        pie = input.nextInt();
        System.out.println("Your Score is  " + pie);
        ass = input1.nextLine();
        System.out.println("Your name is " + ass);

        List<Person> people = new ArrayList<Person>();
        people.add( new Person("Homer", 1) );
        people.add( new Person("Marge", 35) );
        people.add( new Person("Bart", 15) );
        people.add( new Person(ass, pie) );

        // Sort by natural order

        Collections.sort(people);
        System.out.println("Sort by Natural order");
        System.out.println("\t" + people);

        // Sort by reverse natural order

        Collections.sort(people, Collections.reverseOrder());
        System.out.println("Sort by reverse natural order");
        System.out.println("\t" + people);

        //  Use a Comparator to sort by age

        Collections.sort(people, new Person.AgeComparator());
        System.out.println("Sort using Age Comparator");
        System.out.println("\t" + people);

        //  Use a Comparator to sort by descending age

        Collections.sort(people,
            Collections.reverseOrder(new Person.AgeComparator()));
        System.out.println("Sort using Reverse Age Comparator");
        System.out.println("\t" + people);
    }
}

我的期望是：它打印＆＃34;你的分数是：＆＃34;第一我可以输入我想要的信息。

Answer 1

输入乐谱后按Enter键时，您应该阅读＆＃39; nextLine＆＃39;等待下一次输入。

        Scanner input = new Scanner(System.in);
        int pie = input.nextInt();
        input.nextLine();
        String ass = input.nextLine();
        input.close();
        System.out.println("Your Score is  " + pie);
        System.out.println("Your name is " + ass);

注意：最好在读取流后关闭扫描仪。

Answer 2

I want it to print: "Your score is first", but it won't.

由于您在打印邮件之前询问scanner 输入，因此不会先打印

<强>溶液

        System.out.println("Your Score is  " + pie);
        pie = input.nextInt();
        System.out.println("Your name is " + ass);
        ass = input1.nextLine();

我尝试询问用户输入然后将其打印出来，但不打印

2 个答案: