在一个java文件中两个main函数的使用

public class person {
int age;

void shout() {
// int age=23;
System.out.println("my age is" + age);
}

public static void main(String[] args) {
person p1 = new person();
person p2 = new person();
p1.age = -23;
p1.shout();
p2.shout();
}
}

class get {
public static void main(String[] args) {
person p3 = new person();
p3.age = 50;
p3.shout();
}
}