如何使用Java中的Scanner类从控制台读取输入？
如何使用Java中的Scanner类从控制台读取输入？
提问于 2012-08-09 03:13:07
如何使用Scanner类从控制台读取输入？如下所示：
System.out.println("Enter your username: ");
Scanner = input(); // Or something like this, I don't know the code基本上，我想要的就是让扫描程序读取用户名的输入，并将输入赋给一个String变量。
回答 12
Stack Overflow用户
回答已采纳
发布于 2012-08-09 03:29:23
从System.in读取一个整数就是一个简单的例子来说明java.util.Scanner是如何工作的。这真的很简单。
Scanner sc = new Scanner(System.in);
int i = sc.nextInt();为了检索用户名，我可能会使用sc.nextLine()。
System.out.println("Enter your username: ");
Scanner scanner = new Scanner(System.in);
String username = scanner.nextLine();
System.out.println("Your username is " + username);如果希望更好地控制输入，或者只验证username变量，也可以使用next(String pattern)。
您将在API Documentation for java.util.Scanner中找到有关其实现的更多信息
Stack Overflow用户
发布于 2012-08-09 03:15:38
Scanner scan = new Scanner(System.in);
String myLine = scan.nextLine();Stack Overflow用户
发布于 2013-08-20 18:45:54
import java.util.Scanner;
public class ScannerDemo {
public static void main(String[] arguments){
Scanner input = new Scanner(System.in);
String username;
double age;
String gender;
String marital_status;
int telephone_number;
// Allows a person to enter his/her name
Scanner one = new Scanner(System.in);
System.out.println("Enter Name:" );
username = one.next();
System.out.println("Name accepted " + username);
// Allows a person to enter his/her age
Scanner two = new Scanner(System.in);
System.out.println("Enter Age:" );
age = two.nextDouble();
System.out.println("Age accepted " + age);
// Allows a person to enter his/her gender
Scanner three = new Scanner(System.in);
System.out.println("Enter Gender:" );
gender = three.next();
System.out.println("Gender accepted " + gender);
// Allows a person to enter his/her marital status
Scanner four = new Scanner(System.in);
System.out.println("Enter Marital status:" );
marital_status = four.next();
System.out.println("Marital status accepted " + marital_status);
// Allows a person to enter his/her telephone number
Scanner five = new Scanner(System.in);
System.out.println("Enter Telephone number:" );
telephone_number = five.nextInt();
System.out.println("Telephone number accepted " + telephone_number);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/11871520
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