Java Collection Tutorial - Java Set.removeAll(Collection <?> c)

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Syntax

Set.removeAll(Collection <?> c) has the following syntax.

boolean removeAll(Collection <?> c)

Example

In the following code shows how to use Set.removeAll(Collection <?> c) method.

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/* w w  w. ja  v  a 2  s .c  o m*/
public class Main {

  public static void main(String[] a) {
    String elements[] = { "A", "B", "C", "D", "E" };
    Set<String> set = new HashSet<String>(Arrays.asList(elements));

    elements = new String[] { "B", "D", "F", "G", "1", "2", "3", "4" };
    Set<String> set2 = new HashSet<String>(Arrays.asList(elements));

    set.removeAll(set2);
    System.out.println(set);
  }
} 

The code above generates the following result.

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