Set

Java has provided generic support in Set interface.

Syntax

Set<T> set = new HashSet<T>();

Where

• set − object of Set Interface.
• T − The generic type parameter passed during set declaration.

Description

The T is a type parameter passed to the generic interface Set and its implemenation class HashSet.

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Example

Create the following java program using any editor of your choice.

package com.tutorialspoint;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

public class GenericsTester {
   public static void main(String[] args) {

  Set<Integer> integerSet = new HashSet<Integer>();
  
  integerSet.add(Integer.valueOf(10));
  integerSet.add(Integer.valueOf(11));
  Set<String> stringSet = new HashSet<String>();
  
  stringSet.add("Hello World");
  stringSet.add("Hi World");
 

  for(Integer data: integerSet) {
     System.out.printf("Integer Value :%d\n", data);
  }
  Iterator<String> stringIterator = stringSet.iterator();
  while(stringIterator.hasNext()) {
     System.out.printf("String Value :%s\n", stringIterator.next());
  }
   }  
}

This will produce the following result −

Output

Integer Value :10
Integer Value :11
String Value :Hello World
String Value :Hi World