Tagged Questions
4
votes
4answers
521 views
Why do arrays in Java not override equals()?
I was working with a HashSet the other day, which has this written in the spec:
[add()] adds the specified element e to this set if this set contains no element e2 such that (e==null ? e2==null : ...
2
votes
1answer
225 views
Why does Java support brackets behind variables and even behind method signatures? [closed]
Java allows this:
class X{
int i,j[]; // j is an array, i is not
}
and even worse, it allows this:
class X{
int foo(String bar)[][][] // foo actually returns int[][][]
{ return null; } ...
-1
votes
5answers
1k views
Reverse subarray of an array with O(1)
I have an idea how to implement sub array reverse with O(1), not including precalculation such as reading the input. I will have many reverse operations, and I can't use the trivial solution of O(N).
...
-3
votes
2answers
2k views
Java: The best way to learn it when MOOCs and books are not enough? [closed]
This topic was taken from Stack Overflow, but it was put on-hold due to Opinion-based question. So I moved it to here.
I've had some great troubles with my homework exercises and I've used ...
0
votes
1answer
1k views
Sorting an ArrayList by a Split Value [closed]
I am attempting to create an list which should be sorted by a particular field in a colon separated string. I have an array of strings with the following values:
name1:535
name2:697
After sorting ...
-4
votes
1answer
746 views
Program to verify all words in a crossword puzzle are valid
I have my own solution and wanted to check it against something online but couldn't find any examples. How would you solve this one. (I can post my code if necessary). I just want to see if someone ...
0
votes
6answers
861 views
Visualization of N>2-D array? [closed]
I have an array of dimension 5. But, I can't figure out how to visualize that array?
int[][][][][] array = new int[4][4][4][6][2].
Is there a good way to visualize arrays with dimension counts of 3 ...
3
votes
2answers
734 views
Should the 12-String be in its own class and why?
This question is regarding a homework project in my first Java programming class (online program).
The assignment is to create a "stringed instrument" class using (among other things) an array of ...
0
votes
1answer
399 views
Java Dynamic Binding
I am having trouble understanding the OOP Polymorphic principl of Dynamic Binding ( Late Binding ) in Java. I looked for question pertaining to java, and wasn't sure if a overall answer to how dynamic ...
0
votes
2answers
7k views
Best practice Java - String array constant and indexing it
For string constants its usual to use a class with final String values. But whats the best practice for storing string array. I want to store different categories in a constant array and everytime a ...
0
votes
2answers
805 views
Question regarding LinkedList in Java
When I was reading a book for SCJP, I came across the following paragraph.
A LinkedList is ordered by index position, like ArrayList, except that
the elements are doubly-linked to one another. ...
