Question

该程序的工作方式如下 -

创建文件编写器和扫描程序。
创建一个循环（循环3次）。
询问一些问题以收集用户的数据。
将所有收集的数据写入空白文本文件并循环。

我的问题是，在第一个循环之后，程序会问两个问题，而不是逐个问题，并且不允许你回答其中一个问题。

这是我的代码 -

package Week19;

import java.util.Scanner;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;

public class CreatingFiles {
public static void main(String[] args) throws Exception {

    PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter("textfile.txt")));
    Scanner scanner = new Scanner (System.in);

    for(int i=0; i < 3; i++){

        System.out.println("Please enter a name please");
        String employeeName = scanner.nextLine();

        System.out.println("Please enter a job title");
        String employeeJobTitle = scanner.nextLine();

        System.out.println("Please enter a age");
        while(!scanner.hasNextInt()) {
            scanner.next();
        }
        int employeeAge = scanner.nextInt();

        System.out.println("Please enter a salary");
        while(!scanner.hasNextDouble()) {
            scanner.next();
        }
        Double employeeSalary = scanner.nextDouble();

        writer.println("Employee Name: "+ employeeName);
        writer.println("Employee Job Title: "+ employeeJobTitle);
        writer.println("Employee Age: "+ employeeAge);
        writer.println("Employee Salary: "+ employeeSalary);



    }
        writer.close();
        scanner.close();


}
}

错误：

Error I keep receiving

Answer 1

总结答案：在scanner.nextDouble()之后，还有一条新线。通过调用scanner.nextLine()来摆脱它。下面是代码：

package Week19;

import java.util.Scanner;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;

public class CreatingFiles {
public static void main(String[] args) throws Exception {

    PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter("textfile.txt")));
    Scanner scanner = new Scanner (System.in);

    for(int i=0; i < 3; i++){

        System.out.println("Please enter a name please");
        String employeeName = scanner.nextLine();

        System.out.println("Please enter a job title");
        String employeeJobTitle = scanner.nextLine();

        System.out.println("Please enter a age");
        while(!scanner.hasNextInt()) {
            scanner.next();
        }
        int employeeAge = scanner.nextInt();

        System.out.println("Please enter a salary");
        while(!scanner.hasNextDouble()) {
            scanner.next();
        }
        Double employeeSalary = scanner.nextDouble();
        scanner.nextLine();

        writer.println("Employee Name: "+ employeeName);
        writer.println("Employee Job Title: "+ employeeJobTitle);
        writer.println("Employee Age: "+ employeeAge);
        writer.println("Employee Salary: "+ employeeSalary);
    }
    writer.close();
    scanner.close();
}

}

写入文件和循环（循环未正确执行）

1 个答案: