如何使用Scanner类从控制台读取输入?就像这样:

System.out.println("Enter your username: ");
Scanner = input(); // Or something like this, I don't know the code

基本上,我想要的只是让扫描器读取用户名的输入,并将输入分配给一个String变量。


当前回答

import java.util.*;

class Ss
{
    int id, salary;
    String name;

   void Ss(int id, int salary, String name)
    {
        this.id = id;
        this.salary = salary;
        this.name = name;
    }

    void display()
    {
        System.out.println("The id of employee:" + id);
        System.out.println("The name of employye:" + name);
        System.out.println("The salary of employee:" + salary);
    }
}

class employee
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);

        Ss s = new Ss(sc.nextInt(), sc.nextInt(), sc.nextLine());
        s.display();
    }
}

其他回答

Scanner scan = new Scanner(System.in);
String myLine = scan.nextLine();

你可以流动这段代码:

Scanner obj= new Scanner(System.in);
String s = obj.nextLine();
import java.util.*;

class Ss
{
    int id, salary;
    String name;

   void Ss(int id, int salary, String name)
    {
        this.id = id;
        this.salary = salary;
        this.name = name;
    }

    void display()
    {
        System.out.println("The id of employee:" + id);
        System.out.println("The name of employye:" + name);
        System.out.println("The salary of employee:" + salary);
    }
}

class employee
{
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);

        Ss s = new Ss(sc.nextInt(), sc.nextInt(), sc.nextLine());
        s.display();
    }
}

你可以在Java中使用Scanner类

Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
System.out.println("String: " + s);

您可以编写一个简单的程序来询问用户的姓名,并打印任何回复使用的输入。

或者要求用户输入两个数字,您可以对这些数字进行加、乘、减或除,并像计算器一样打印用户输入的答案。

这里你需要Scanner类。你必须导入java.util.Scanner;,并且在你需要使用的代码中:

Scanner input = new Scanner(System.in);

Input是一个变量名。

Scanner input = new Scanner(System.in);

System.out.println("Please enter your name: ");
s = input.next(); // Getting a String value

System.out.println("Please enter your age: ");
i = input.nextInt(); // Getting an integer

System.out.println("Please enter your salary: ");
d = input.nextDouble(); // Getting a double

看看这有什么不同:input.next();, i = input.nextInt();, d = input.nextDouble();

根据String类型,int类型和double类型的变化方式与其他类型相同。不要忘记代码顶部的import语句。