Get index of contain sublist from list java

Question

I have string lists look like this:

 List parentDataList:  {\"this\", \"is\", \"a\", \"test\", \"string\", \"and\", \"a\", \"test\", \"other\"}         


        

Answer 1

The method Collections.indexOfSubList will give you the desired information.

Returns the starting position of the first occurrence of the specified target list within the specified source list, or -1 if there is no such occurrence. More formally, returns the lowest index i such that source.subList(i, i+target.size()).equals(target), or -1 if there is no such index. (Returns -1 if target.size() > source.size().)

int index=Collections.indexOfSubList(parentDataList, child1);
…

The index interval will be from index, inclusive, to index+child1.size(), exclusive. Unless the returned index is -1, of course. In the latter case the sublist was not found.