Java 字符串和int的扫描器

代码如下：

导入java.util.Scanner

公开课预科1{

public static void main(String[] args)
{
    int programcase = 0;
    Scanner inputscan = new Scanner(System.in);

    System.out.print("Enter case number: ");
    programcase = inputscan.nextInt();

    switch(programcase)
    {
    case 1:
        {
            ////////////////////////////////////////////////////////////////////////////////////

            //WRITE THE CODE OF CASE 1 HERE
            Scanner scan = new Scanner(System.in);

            System.out.println("Enter first student's name: ");
            String name1 = scan.nextLine(); 
            System.out.println("Enter " + name1 + "'s first grade: ");
            int firstGrade = scan.nextInt();
            System.out.println("Enter " + name1 + "'s second lab grade: ");
            int secondGrade = scan.nextInt();
            System.out.println("Enter " + name1 + "'s third lab grade: ");
            int thirdGrade = scan.nextInt();
            System.out.println("Enter " + name1 + "'s fourth lab grade: ");
            int fourthGrade = scan.nextInt();

            System.out.println("Enter second student's name: ");
            int name2 = scan.nextInt();
            System.out.println("Enter " + name2 + "'s first lab grade: ");
            int secondfirstGrade = scan.nextInt();
            System.out.println("Enter " + name2 + "'s second lab grade: ");
            int secondsecondGrade = scan.nextInt();
            System.out.println("Enter " + name2 + "'s third lab grade: ");
            int secondthirdGrade = scan.nextInt();
            System.out.println("Enter " + name2 + "'s fourth lab grade: ");
            int secondfourthGrade = scan.nextInt();

            System.out.println("/+CENG 111 Course Student List+" + "\\");
            System.out.println("Name\t\t\t/Lab1\t/Lab2\t/Lab3\t/Lab4");
            System.out.println(name1 + "\t\t\t/" + firstGrade + "\t/" + secondGrade + "\t/" + thirdGrade + "\t/" + fourthGrade);
            System.out.println(name2 + "\t\t\t/" + secondfirstGrade + "\t/" + secondsecondGrade + "\t/" + secondthirdGrade + "\t/" + secondfourthGrade);

            scan.close();

它继续运行，但并不重要。当我运行它时，它运行得很好，但在那里它说： 输入第二个学生的姓名： 进入二年级学生实验室：

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因此，它不必等待我写下名称，而是跳转到另一个问题。我如何解决这个问题？

这是Scanner类的错误行为。它无法正确清除其缓冲区，并希望所有输入都是相同的数据类型

要解决此问题，请改用BufferedReader

BufferedReader x = new BufferedReader (new InputStreamReader (System.in));

int a = Integer.parseInt (x.readLine());

String n = x.readLine();

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“这是Scanner类的一个错误行为。”不，不是。你的答案根本错误。“它无法正确清除其缓冲区”它能够做到这一点，但前提是你能够正确使用这个类。阅读JavaDoc（可能还有一些教程）应该会对你有所帮助。