Can we declare more than one public class in single .java file

[bunty wadekar]

public abstract class Person {

protected int dollars;
protected int friends;

public void makeDollar ( ){
dollars++;
}

public void makeFriend (){
friends++;
}

/* method that calculates level of happiness;
to be implemented by subclasses ( differnet
kinds of people derive their happiness from
different things ) */

public abstract int getHappiness();

}

public class GreedyPerson extends Person {

public int getHappiness() {
int happinessValue;
int moneyWeight = 10;
int friendsWeight = 1;

happinessValue = (moneyWeight * dollars) +
( friendsWeight * friends);

return happinessValue;
}
}

public class SocialPerson extends Person {

public int getHappiness() {
int happinessValue;
int moneyWeight = 1;
int friendsWeight = 10;

happinessValue = (moneyWeight * dollars) +
( friendsWeight * friends);

return happinessValue;
public static void main(String[] args){}


}
}
I got the follwing error ::

SocialPerson.java:1: class Person is public, should be declared in a file named
Person.java
public abstract class Person {
^
SocialPerson.java:23: class GreedyPerson is public, should be declared in a file
named GreedyPerson.java
public class GreedyPerson extends Person {
^
2 errors

[Ernest Friedman-Hill]

No, you can't. You should put each public class in a file named after that class -- as the error messages explain rather clearly.