Things you can do with Sets : Set « Collections Data Structure « Java

1. Java
2. Collections Data Structure
3. Set

Things you can do with Sets

         
// : c11:Set1.java
// Things you can do with Sets.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.TreeSet;

public class Set1 {

  static void fill(Set s) {
    s.addAll(Arrays.asList("one two three four five six seven".split(" ")));
  }

  public static void test(Set s) {
    // Strip qualifiers from class name:
    System.out.println(s.getClass().getName().replaceAll("\\w+\\.", ""));
    fill(s);
    fill(s);
    fill(s);
    System.out.println(s); // No duplicates!
    // Add another set to this one:
    s.addAll(s);
    s.add("one");
    s.add("one");
    s.add("one");
    System.out.println(s);
    // Look something up:
    System.out.println("s.contains(\"one\"): " + s.contains("one"));
  }

  public static void main(String[] args) {
    test(new HashSet());
    test(new TreeSet());
    test(new LinkedHashSet());
  }
} ///:~



           
         
    
    
    
    
    
    
    
    
  

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