HASH_SET_DEMO

PHOTO EMBED

Wed May 29 2024 13:13:09 GMT+0000 (Coordinated Universal Time)

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import java.util.*;
public class HashSetDemo
{
public static void main(String[] args)
{
HashSet<String> hs = new HashSet<>();
hs.add("first"); hs.add("second"); hs.add("third"); 
hs.add("fourth"); hs.add("fifth"); hs.add("sixth");
System.out.println("Contents: " + hs);
System.out.println("Size: " + hs.size());
System.out.println();
Object[] arrayS = hs.toArray();
for(Object each: arrayS)
System.out.println(each);
System.out.println();
String[] arrayS2 = new String[hs.size()];
arrayS2 = hs.toArray(arrayS2);
for( String each: arrayS2)
System.out.println(each);
System.out.println();
Iterator it = hs.iterator();
while(it.hasNext())
System.out.println(it.next());
System.out.println();
System.out.println("Empty? " + hs.isEmpty());
System.out.println();
hs.remove("fourth");
System.out.println("Contents: " + hs);
System.out.println("Size: " + hs.size());
}
}
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