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"category:/java/brainteaser"


Title and summary Date/time
1
Brainteaser Drools: Testing Objects
This can be a hard one, since it requires from you to be familiar with Drools. Consider the condition side of the following rules: rule "object comparison one"no-loop when $customer1 : Customer( ) $customer2 : Customer(this != $customer1) then ...
22/08/2009
10:50:00 PM
2
Brainteaser: Overridable methods
Consider the following case of inheritance: public class Parent { public Parent() { getValue(); } public void getValue() { }}public class Child extends Parent { private final Integer integer; public Child() { integer = new Integer(888); ...
18/04/2009
12:02:00 PM
3
Brainteaser: Broken case of inheritance
Consider the following case of inheritance: public class ExtendingHashSetE extends HashSetE { private int counter = 0; public ExtendingHashSet() { } @Override public boolean add(E e) { counter++; return super.add(e); } ...
05/04/2009
8:34:00 PM
4
Brainteaser: Broken comparator
Question: The following program returns result "1", which indicates that first Integer value is greater than the second, why? import java.util.*;public class Example { public static void main(String[] args) { ...
19/10/2008
1:25:00 AM
5
Brainteaser: ArrayList VS TreeSet
When I came across the following example I did not expect the results that the program has printed :) hehe... Question: What does this program print? Why? import java.util.*;public class SetList { public static void main(String[] args) { ...
01/10/2008
1:31:00 PM
6
Brainteaser: Hidden iterators
... While locking can prevent iterators from throwing ConcurrentMofdificat...
07/09/2008
6:05:00 PM