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Anonymous said...

public List getDuplicateArray(String[] in){
Map indexMap=null;
List indexArray=null;
indexMap=new HashMap<>();
for(String n:in) {
if(indexMap.containsKey(n)) {
indexMap.put(n,2);
}else {
indexMap.put(n,1);
}
indexArray=new ArrayList();
for(Integer key:indexMap.keySet()) {
if(indexMap.get(key)>1) {
indexArray.add(key);
}

}return indexArray;

Feb 24, 2019, 1:59:39 PM

Posted to 3 Ways to Find Duplicate Elements in an Array - Java