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marți, 5 mai 2015

[OmniFaces utilities 2.0] Create an unmodifiable set based on the given values

[OmniFaces utilities] The unmodifiableSet() method creates an unmodifiable set based on the given values. If one of the values is an instance of an array or a collection, then each of its values will also be merged into the set. Nested arrays or collections will result in a ClassCastException.


import org.omnifaces.util.Utils;
String a = "1";
Integer b = 2;
Byte[] c = new Byte[]{3, 4, 5};
List<String> d = new ArrayList<>();

// the unmodifiable Set will contain: 1,2,3,4,5,6,7
Set<Object> all = Utils.unmodifiableSet(a, b, c, d);

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