Hi - here you go.
Note, Set is an interface so I implement it with 3 different concert
classes, namely
HashSet
LinkedHashSet
TreeSet
using generics.
If you're not familiar with generics, then remove all occurences of
<Integer>
Hope this helps.
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import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.TreeSet;
public class MySet {
public static void test(Set<Integer> set, String string){
set.add(new Integer(1));
set.add(new Integer(4));
set.add(new Integer(2));
set.add(new Integer(3));
System.out.println(string+":");
Object[] array=new Object[set.size()];
array=set.toArray();
for(int i=0; i<set.size(); i++) {
for(int j=0; j<set.size(); j++) {
if(j > i) {
System.out.println(array[i]+","+array[j]);
}
}
}
}
public static void main(String args[]){
test(new HashSet<Integer>(),"HashSet");
test(new TreeSet<Integer>(),"TreeSet");
test(new LinkedHashSet<Integer>(),"LinkedHashSet");
}
}
Pedro Pedruzzi wrote:
Hi,
What I'd like to do is iterate through each subset of size 2 of a Set.
Example:
My set is: S = {1,2,3,4}
I'd like to iterate throught every one of these subsets:
{1,2}, {1,3}, {1,4}, {2,3}, {2,4} and {3,4}.
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