java create a set with values
Set<String> set = new HashSet<>(Arrays.asList("a", "b", "c"));java create a set with values
Set<String> set = new HashSet<>(Arrays.asList("a", "b", "c"));set in java
SET: Can only store unique values,
And does not maintain order
- HashSet can have null, order is not guaranteed
- LinkedHashSet can have null and keeps the order
- TreeSet sorts the order and don't accept nullhow to check how many elements in a set java
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/*
check a set size by set.size()
*/
public class MainClass {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set set = new HashSet(Arrays.asList(elements));
System.out.println(set.size());
}
}Copyright © 2021 Codeinu
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