java中的异常线程

我有一个“线程异常”错误。我创建了一个公共类

student

，并给它三个类：学生姓名、学生ID和学生GPA。当我运行代码并为student1输入信息时，一切正常。但是当我输入student2时，代码会跳过student2的名称，并给出学生id和GPA。我该怎么补救呢

代码如下：

import java.util.Scanner;
class Student {

    public String name;
    public int id;
    public float gpa;
}
public class learning {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        Student s1 = new Student();
        System.out.print("Enter your name: ");
        s1.name = input.nextLine();
        System.out.print("Enter your id: ");
        s1.id = input.nextInt();
        System.out.print("Enter your gpa: ");
        s1.gpa = input.nextFloat();


        Student s2 = new Student();
        System.out.print("Enter your name: ");
        s2.name = input.nextLine();
        System.out.print("Enter your id: ");
        s2.id = input.nextInt();
        System.out.print("Enter your gpa: ");
        s2.gpa = input.nextFloat();


        Student s3 = new Student();
        System.out.print("Enter your name: ");
        s3.name = input.nextLine();
        System.out.print("Enter your id: ");
        s3.id = input.nextInt();
        System.out.print("Enter your gpa: ");
        s3.gpa = input.nextFloat();

        System.out.println("your name: " + s1.name + "\n"
                + "your id: " + s1.id + "\n"
                + "your GPA: " + s1.gpa);

    }

}

---

如果您同时使用

nextLine

和

next/nexttint/nextDouble

，您的扫描仪将出现故障。有关更多信息，请参阅

我相应地改变了你的主要方法，它现在可以像你所希望的那样工作了

public static void main(String[] args) {

    Scanner input = new Scanner(System.in);

    Student s1 = new Student();
    System.out.print("Enter your name: ");
    s1.name = input.nextLine();
    System.out.print("Enter your id: ");
    s1.id = Integer.parseInt(input.nextLine());
    System.out.print("Enter your gpa: ");
    s1.gpa = Float.parseFloat(input.nextLine());

    Student s2 = new Student();
    System.out.print("Enter your name: ");
    s2.name = input.nextLine();
    System.out.print("Enter your id: ");
    s2.id = Integer.parseInt(input.nextLine());
    System.out.print("Enter your gpa: ");
    s2.gpa = Float.parseFloat(input.nextLine());

    Student s3 = new Student();
    System.out.print("Enter your name: ");
    s3.name = input.nextLine();
    System.out.print("Enter your id: ");
    s3.id = Integer.parseInt(input.nextLine());
    System.out.print("Enter your gpa: ");
    s3.gpa = Float.parseFloat(input.nextLine());

    System.out.println("your name: " + s1.name + "\n" + "your id: " + s1.id + "\n" + "your GPA: " + s1.gpa);

}

---

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