Question: Which XXX is the proper default constructor? public class Employee { private int id; XXX } : public Employee ( ) { int id =

Which XXX is the proper default constructor? public class Employee { private int id; XXX } : public Employee(){
int id =10000;
}
public Employee(int id){
id = id;
}
public Employee(){
id =23456;
}
private Employee(){
id =10000;
}

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