Drag n Drop Question

[Sandeep Chhabra]

Hi,
This was a question from whizlabs:
The Bold words are what i have filled in the code

import java.util.*;
class Employee
{
String name;
int age;
Employee(String name, int age)
{
this.name=name;
this.age=age;
}
String getName()
{
return name;
}
int getAge()
{
return age;
}
public String toString()
{
return name +" of age "+ age;
}
}
 
class MyComparator<T extends Employee> implements Comparator<T>
{
public int [B]compare[/B]([B]T[/B] obj1, [B]T[/B] obj2)//1
{
String name1=obj1.getName();
String name2=obj2.getName();
if(!name1.equals(name2))
{
return name1.[B]compareTo[/B](name2);
 
}
else 
return obj1.age-obj2.age;
}
}
 
class Generics3
{
public static void main(String[]a)
{
[B]Set<Employee>[/B] set=[B]new TreeSet<Employee>(new MyComparator<Employee>());[/B]
set.add(new Employee("Jacob",30));
set.add(new Employee("George",29));
set.add(new Employee("Daisy",40));
set.add(new Employee("Daisy",22));
 
for([B]Employee[/B] e:set)
{
System.out.println(e);
}
}
}

This code Compiles fine and output is sorted by name and age of employees.

At the line where i have marked 1 instead of :
public int compare(T obj1, T obj2)//1
I made it
public int compare(Employee obj1, Employee obj2)//1

That means i used Employee instead of T.
The output of both the programs is same
I wanted to konw that is it wrong to do this in the exam?

[Sara Olsen]

This does not compile:
public int compare(Employee obj1, Employee obj2)//1

My compiler says:
The type MyComparator<T> must implement the inherited abstract method Comparator<T>.compare(T,T).

[Sandeep Chhabra]

Sara,

public int compare(Employee obj1, Employee obj2)//1
It compiles fine in JDK 1.5 and the output is :
------------------
Daisy of age 22
Daisy of age 40
George of age 29
Jacob of age 30
-----------------=

[Sara Olsen]

Ok strange, cause I pasted your code in Eclipse, and compiled it with version 1.5 and it does not compile:-)

[Hein Behrens]

Works here textpad and Java 1.5

Compiles and runs both versions

[Sandeep Chhabra]

But yet nobody answered me...??