Two arrays - one hash

[PDB1982]

Is it possible to add two separate arrays into one hash set?

[BestJewSinceJC]

Yes. The HashMap class's add() method takes an Object as a parameter. As you can see in the Java language specification, arrays are Objects.

See:
http://java.sun.com/docs/books/jls/second_edition/html/arrays.doc.html
http://download.oracle.com/javase/1.4.2/docs/api/java/util/HashSet.html

[PDB1982]

How do I go about making it though....I've tried:

h2.addAll(numbers);
h2.addAll(numbers2);

//Give me just the values from numbers2

and

h2.add(numbers);
h2.add(numbers2);

//which gives an error on the "add" portion of the code

and

h2.add(numbers,numbers2);

//which gives an error on the "add" portion of the code

[PDB1982]

Any ideas?

[JamesCherrill]

Are you wanting to add the two arrays as two elements, or are you wanting to add all the elements in the arrays?
For the first case

int[] a = {1,2,3};
    int[] b = {4,5};
    HashSet h = new HashSet();
    h.add(a);
    h.add(b);
    for (Object o : h) System.out.println(o);
    // prints two array objects

for the second

int[] a = {1,2,3};
    int[] b = {4,5};
    HashSet h = new HashSet();    
    for (int i : a) h.add(i);
    for (int i : b) h.add(i);   
    for (Object o : h) System.out.println(o);
    // prints 1 .. 5

[PDB1982]

Why is it that when I use my arrays in place of the "a" or "b" in the example, I only come out with the values in array b?

public void AddNumbers()
		{   
			HashSet<Integer> h = new HashSet<Integer>();    
			for (int i : numbers) h.add(i);
			for (int i : numbers2) h.add(i);   
			for (Object o : h) System.out.println(o);
		}

Output:

Please Enter 5 variables (First Set): 
Please enter value in slot 0:1
Please enter value in slot 1:2
Please enter value in slot 2:3
Please enter value in slot 3:4
Please enter value in slot 4:5
ArrayList Values Are: [1, 2, 3, 4, 5]

Please Enter 5 variables (2nd Set): 
Please enter value in slot 0:6
Please enter value in slot 1:7
Please enter value in slot 2:8
Please enter value in slot 3:9
Please enter value in slot 4:10
ArrayList Values Are: [1, 2, 3, 4, 5]/n
Adjusted numbers1: [1, 2, 3, 4, 5]
Adjusted numbers2: [6, 7, 8, 9, 10]
6
7
8
9
10

[JamesCherrill]

Loo at your arraylist output in lines 8 and 16. It looks like you are putting the wrong numbers in your arrays somehow?
Anyway, that little code snippet is OK - so the problem lies somewhere else. Do you want to post more of the code?