This topic is about Java Generics – 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.
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
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