java SE 简单的输入输出(快速掌握)

import java.util.Scanner;//调用对应的包
public class Test {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        //首先构造一个与"标准输入流"System.in关联的Scanner对象;
        //构造器和new操作符以后会讲
        System.out.println("what your name?");
        String name=sc.nextLine();//读取输入的一行内容;
        System.out.println("How old are you? ");
        int age = sc.nextInt();//读取一个整数;
        //输出
        System.out.println("Ok," + name + " ,next year,you will be " + (age + 1));

    }
}

参考:java核心技术参考代码