Questions tagged [unmodifiable]
67 questions
0
votes
2 answers
Can Collections.unmodifiableMap retain the original map?
I have a piece of code below:
class Util {
private static final Map MY_MAP;
static {
Map tmpMap = new TreeMap();
tmpMap.put("key1", "val1");
tmpMap.put("key2",…
injoy
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0
votes
3 answers
Why don't the unmodifiable methods from Collections class, create collections with new elements?
Suppose there is this code:
List modifiableList = new ArrayList(Arrays.asList("1","2","3"));
List unmodifiableList =…
Random42
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0
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2 answers
an example to illustrate this point on unmodifiableCollection in Java?
I am reading Core Java Volume I - fundamentals (9th edition) by Cay S. Horstmann and Gary Cornell. Here is a paragraph from the book which I do not understand. If you could demonstrate with a simple example what it means, it would be great.…
eagertoLearn
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0
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1 answer
JavaScript, defining unmodifiable Enumerations
So, I was inspired by this question ( Enums in JavaScript? ) to get to work on a library insert for JavaScript to enable unmodifiable Enumerations. I have a decently working method defined already, but I'd like to flesh it out more.
This concept…
Duncan
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-1
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2 answers
Confusion in chossing data structure
I want to create a Map. Which is the best option for me?
I tried this one
private Map[]> questionIdToanswersMapping = Collections.unmodifiableMap(Stream.of(
new…
user3681970
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-1
votes
2 answers
unmodifiable Map still accept adding entries without return UnsupportedOperationException
Am trying out adding entry to unmodifiable Map, JVM catch UnsupportedOperationException when adding entry to a subview of original Map, but JVM does not care about direct adding to the original view, code speaks :
ConcurrentMap…
Rehme
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-3
votes
1 answer
Collections.unmodifiableList wraps already unmodifiable list?
In Collections.unmodifiableList implementation I see that it always wraps the given list with UnmodifiableList even if the given list is already UnmodifiableList... So if i'm calling this method over and over - i get a huge stack trace, like this:
…
duduamar
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