Question

int j = 0; 
List<Integer> i = j > 0 ? Collections.emptyList() : new ArrayList<Integer>(); // compiler error:cannot convert from List<capture#1-of ? extends Object> to List<Integer>

while,

List<Integer> li = Collections.emptyList(); // it works

Although i know the type erasure, i do not the reason of compiling failed!

Help, thx!

Answer 1

Try this:

List<Integer> i = j > 0 ? Collections.<Integer>emptyList() : new ArrayList<Integer>();