Java collection with Incompatible types error

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So I have this function, and it's not compiling. What is the problem?

The compiling error is Line 4: error: incompatible types

public List<List<Integer>> myfunc(int[] num) {

        List<List<Integer>> r = new ArrayList<ArrayList<Integer>>();  //line 4
        return r;
}

Thanks!!

asked 24 secs ago

user511792

85

Java collection with Incompatible types error