This class will run a few simple tests using the new Java 8 features 'lambda expressions' and 'Streams'.

JavaEightTests.java

import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;
import java.util.stream.*;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.File;

public class JavaEightTests
{
  public static void main(String[] args) throws Exception
	{
		System.out.println("Welcome to Java 8");
		JavaEightTests jet = new JavaEightTests();
		List<String> words = JavaEightTests.getLinuxWords();
		jet.test1();
		jet.processStream(words.stream());
		jet.processStream(words.stream());
		jet.processStream(words.parallelStream());
		jet.processStream(words.parallelStream());
	}

	public void processStream(Stream<String> wordStream) throws Exception
	{
		Long start = System.currentTimeMillis();

		List<String> beginsWithTBothCase = wordStream
			.map(s -> {
				for(int i = 0; i < 100; i++)
				{
					s = s.toLowerCase().toUpperCase();
				}
				return s;
	        })
			.collect(Collectors.toList());

		long totalTime = System.currentTimeMillis() - start;
		System.out.println(String.format("Task took %.3f seconds to execute.", totalTime/1000f));
	}


	public void test1()
	{
		List<String> strings = Arrays.asList("One","Two","Three","Four","Five");
		List<String> longerThanThree = strings
			.stream()
			.filter(s -> s.length() > 3)
			.collect(Collectors.toList());

		List<String> uppers = strings
			.stream()
			.map(s -> s.toUpperCase())
			.collect(Collectors.toList());
		
		List<String> beginsWithTBothCase = strings
			.stream()
			.filter(s -> s.startsWith("T"))
			.map(s -> s.toLowerCase() + s.toUpperCase())
			.collect(Collectors.toList());


		System.out.println(strings);
		System.out.println(longerThanThree);
		System.out.println(uppers);
		System.out.println(beginsWithTBothCase);
	}

	public static List<String> getLinuxWords() throws Exception
	{
		BufferedReader br = new BufferedReader(new FileReader(new File("linux.words")));
		List<String> linuxWords = new ArrayList<String>();
		String line = br.readLine();
		while(line != null)
		{
			linuxWords.add(line);
			line = br.readLine();
		}
		return linuxWords;

	}
}