Java Utililty Methods List xor

List of utility methods to do List xor

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Description

The list of methods to do List xor are organized into topic(s).

Method

voidxor(List l1, List l2)
Adds object from list 2 to list 1, unless they are already present (then removes them). 
int size = l1.size();
for (int i = 0, iMax = l2.size(); i < iMax; i++)
    if (!l1.contains(l2.get(i)))
        l1.add(l2.get(i));
for (int i = size - 1; i >= 0; i--)
    if (l2.contains(l1.get(i)))
        l1.remove(i);
byte[]xor(List blocs)
xor 
final byte result[] = new byte[blocs.get(0).length];
for (int i = 0; i < result.length; i++) {
    result[i] = xor(blocs, i);
return result;
ListxorOnLists(List l1, List l2)
xor On Lists 
boolean xor = l1 == null ^ l2 == null;
if (xor) {
    return l1 == null ? l2 : l1;
if (l1 != null) {
    l1.clear();
    return l1;
return null;