编写Java程序，定义一个类student,包括域“学号、姓名、年龄”；方法“获得学号、姓名、年龄、修改年龄”？
public static class students {
int number;
String name;
int age;
public int getName (String number) {
this.number = number;
return number;
}
public string getName (String name){
this. name = name;
return name;
}
public int getAge(int age) {
this.age = age;
return age;
}
public void changeAge(int changeAge) {
age = changeAge;
}
}