How is List.of() working? - Cracking the Java Coding Interview

[larryd]

List of one primitive array was the root of many frustrated hours.

[pranayvonteru]

Sir I am a complete beginner in java..
Recently I learnd basics and some Oops concepts how can I learn these advanced concepts which are used to develop projects by using java.can you suggest me any root map to learn the core concepts.

[CrapE_DM]

I was under the impression that for fewer than 10 elements, it didn't use an array or vararg.

[Speiger]

It would be awesome if java actually would enforce nullable and nonnull.
Because at the moment you can just simply violate these rules and the compiler doesn't care.

Not even a simple warning...

[dilendrasajini]

int[] newArrayString = {1, 2, 3, 4, 5};
List<int[]> listArray = List.of(newArrayString);
newArrayString[2]= 4;
for(int[] x : listArray){
System.out.println(x[2]);
} This prints 4 as output. that means listArray is not a defensive copy. Is that right?

[saichaithvik]

I have added null value and working
List<String> arryStr = new ArrayList<String>();
arryStr.add("2");
arryStr.add("12");
arryStr.add("22");
arryStr.add(null);
arryStr.add("23");

List uar1 = List.of(arryStr);
System.out.println("uar us "+uar1);
for(Object l : uar1)
System.out.println("uar for loop 2 us "+l);