Java Stream Archives - Huong Dan Java

Group by using Stream and Collectors in Java

In SQL, the GROUP BY statement returns the set of records having the same value in particular criteria. For example, you have a table that contains student information, each student coming from a different country. Use the GROUP BY statement according to national criteria, you… Read More

stream() method of Optional object in Java

7 years ago by Khanh NguyenJava Basic

This method is supported since Java 9. This method is used to create a new Stream object from an Optional object in Java. If the Optional object contains a value, this method will return the Stream object containing that value, otherwise, it returns an empty… Read More

Method iterate() of Stream object in Java

7 years ago by Khanh NguyenJava Basic

In Java 8, the iterate() method has been introduced and it has only two parameters and will help us to create an infinite stream. Content:

public static<T> Stream<T> iterate(final T seed, final UnaryOperator<T> f)

1	public static<T> Stream<T> iterate(final T seed, final UnaryOperator<T> f)

Example:

package com.huongdanjava.javastream;

import java.util.stream.Stream;

public class Example {

	public static void main(String[] args) {
		Stream.iterate(1, i -> i + 1).forEach(System.out::println);
	}
}

package com.huongdanjava.javastream;

import java.util.stream.Stream;