用户交互Scanner

//从键盘接收数据
Scanner scanner = new Scanner(System.in);

    System.out.println("使用nextLine方式接收");
    //判断是否还有输入
    if (scanner.hasNextLine()){
        String str = scanner.nextLine();
        System.out.println("输出的内容为："+str);
    }
    scanner.close();

---

package scanner;

import java.util.Scanner;

public class Demo02 {
public static void main(String[] args) {
//从键盘接收数据
Scanner scanner = new Scanner(System.in);

    System.out.println("使用nextLine方式接收");
    //判断是否还有输入
    if (scanner.hasNextLine()){
        String str = scanner.nextLine();
        System.out.println("输出的内容为："+str);
    }
    scanner.close();
}

}