新学习：构造方法的重载，给成员变量赋值

错误代码：

class Student {public static void main(String[] args) {Person p = new Person();p.setAge(24);p.setName("杨洋");p.show();System.out.println("Hello World!");}//静态方法中不能引用非静态变量
class Person//这个类不能嵌套在类Student中，否则报错：无法从静态上下文中引用非静态变量 this{private int age;private String name;public Person(){ //空参构造}public Person(String name, int age){//有参构造this.name = name;this.age = age;}public void setAge(int age){this.age = age;}public void setName(String name){this.name = name;}public int getAge(){return age;}public String getName(){return name; }public void show(){System.out.println("姓名" + name + "年龄" + age);}}}

修改：类Person需要从类Student中拿出来