package com.imoocTest;class Duo{ String name; String sex; int age; public void study(){ System.out.println(name+"在学习"); } public void introduce(){ System.out.println("我叫"+name+",性别"+sex+",年龄"+age); }} public class Student{ public static void main(String[] args) { Duo student=new Duo(); student.name="张三"; student.sex="男"; student.age=10; }}新人求教,代码啥的eclipse未报错,但是consoles里面啥都没有。