class Person
{
public String name;
public int age;
public Person(String name, int age)
{
this.name=name;
this.age=age;
}
public Person()
{
}
public void getInfo()
{
System.out.println(name);
System.out.println(age);
}
}
class Student extends Person
{
public void study()
{
System.out.println("Student");
}
public static void mian(String[] args)
{
Person p = new Person();
p.name = "Person";
p.age = 30;
p.getInfo(); Student s = new Student();
s.name = "Student";
s.age = 16;
s.getInfo();
s.study();
}
}
{
public String name;
public int age;
public Person(String name, int age)
{
this.name=name;
this.age=age;
}
public Person()
{
}
public void getInfo()
{
System.out.println(name);
System.out.println(age);
}
}
class Student extends Person
{
public void study()
{
System.out.println("Student");
}
public static void mian(String[] args)
{
Person p = new Person();
p.name = "Person";
p.age = 30;
p.getInfo(); Student s = new Student();
s.name = "Student";
s.age = 16;
s.getInfo();
s.study();
}
}
因为你的文件里没有public类
编译这个文件也没事,
不过要是运行就要java Student另外...是main, 不是mian..
一个文件只能有一个public的类
晕 !!!
原来是我把main函数写错了,所以运行有一个main方法错误.