一、语法

1 导入

import java.util.Scanner;

2 创建对象

Scanner scanner = new Scanner(System.in);

3 创建变量

int x = scanner.nextInt();

二、举例代码

package learn;
import java.util.Scanner;

public class Object {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String x = scanner.nextLine();
        System.out.println(x);
    }
}