Fast Lookup of Java
Set<String> animals = new HashSet<String>(
Arrays.asList("cat", "dog", "squirrel", "raccoon"));
if (animals.contains("dog")) {
System.out.println("Yep, dog's here!"); // prints
}
if (!animals.contains("aardvark")) {
System.out.println("Ah, aardvark's missing!"); // prints
}java check if key exists in list
if (lista.contains(conta1)) {
System.out.println("Account found");
} else {
System.out.println("Account not found");
}Copyright © 2021 Codeinu
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