About Question enthuware.ocpjp.v8.2.1864 :

[mihai_d]

Answer appears to be wrong for this question:

Code: Select all

Map<String, Integer> map1 = new HashMap<>(); 
map1.put("a", 1); 
map1.put("b", 1); 
map1.merge("b", 1, (i1, i2)->i1+i2); 
map1.merge("c", 3, (i1, i2)->i1+i2); 
System.out.println(map1);

Quiz says it will throw NullPointerException at runtime
However, running the code results in:

{a=1, b=2, c=3}

No hint in the documentation either as to why it would throw NPE in this case.

[admin]

You are right but I see that option 1 ({a=1, b=2, c=3}) is indeed marked as correct not option 4 (NPE).

[MichaelZett]

A really small thing: the font for the 1st answer seems to be smaller than the others,

[admin]

Fixed.
thank you for your feedback!