How to input a number from the keyboard in java

Keyboard input allows users to input data into the program while the program is running, achieving the effect of human-computer interaction and improving user experience.

1. Keyboard input process

(1) The import package (importjava.util.Scanner) tells the program where this tool is.

(2) Create object (Scannersc=newScanner(http://System.in).

(3) Get data (intnum=sc.nextInt();) Use tools.

2. Example

import java.util.Scanner;
 
public class Test{
 
public static void main(String[] args){
 
Scanner sc = new Scanner(http://System.in);
 
System.out.println("请输入您的年龄：");
 
int age = sc.nextInt();
 
if(age<18){ System.out.println("毛头小子");
 
}else{ System.out.println("成年人了");
 
}
 
}
 
}

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