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TypeScript code snippet – How 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));

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