diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..0036b29 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +/Chapter01/P01_CountDuplicateCharacters/target/ +/Chapter01/P03_ReverseWords/target/ +/Chapter01/P05_CountVowelsAndConsonants/target/ +/Chapter01/P05_CountVowelsAndConsonants1/target/ +/Chapter01/P02_TextBlockDelimiters/target/ diff --git a/Chapter03/README.md b/Chapter03/README.md index 0a01b76..9e889c5 100644 --- a/Chapter03/README.md +++ b/Chapter03/README.md @@ -1,2 +1,2 @@ # Working with date and time -This chapter includes 20 problems that involves date and time. These problems are meant to cover a wide range of topics (e.g., converting, formatting, adding, subtracting, defining periods/durations, computing, etc) via **Date**, **Calendar**, **LocalDate**, **LocalTime**, **LocalDateTime**, **ZoneDateTime**, **OffsetDateTime**, **OffsetTime**, **Instant** and so on. +This chapter includes 20 problems that involves date and time. These problems are meant to cover a wide range of topics (e.g., converting, formatting, adding, subtracting, defining periods/durations, computing, etc) via **Date**, **Calendar**, **LocalDate**, **LocalTime**, **LocalDateTime**, **ZoneDateTime**, **OffsetDateTime**, **OffsetTime**, **Instant** and so on. diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/nb-configuration.xml b/Chapter06/BONUS_2_CopyFileBenchmark/nb-configuration.xml new file mode 100644 index 0000000..ec4540c --- /dev/null +++ b/Chapter06/BONUS_2_CopyFileBenchmark/nb-configuration.xml @@ -0,0 +1,18 @@ + + + + + + none + + diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/pom.xml b/Chapter06/BONUS_2_CopyFileBenchmark/pom.xml new file mode 100644 index 0000000..7eb5ecb --- /dev/null +++ b/Chapter06/BONUS_2_CopyFileBenchmark/pom.xml @@ -0,0 +1,72 @@ + + + 4.0.0 + java.modern.challenge + BONUS_2_CopyFileBenchmark + 1.0 + jar + + UTF-8 + 20 + 20 + 3.8.0 + 1.35 + 3.10.1 + 3.1.0 + + BONUS_2_CopyFileBenchmark + + + org.openjdk.jmh + jmh-core + ${jmh.version} + + + org.openjdk.jmh + jmh-generator-annprocess + ${jmh.version} + + + + + + org.apache.maven.plugins + maven-compiler-plugin + ${oamp.version} + + + + org.openjdk.jmh + jmh-generator-annprocess + ${jmh.version} + + + + + + org.codehaus.mojo + exec-maven-plugin + ${ocm.version} + + + run-benchmarks + integration-test + + exec + + + test + java + + -classpath + + org.openjdk.jmh.Main + .* + + + + + + + + \ No newline at end of file diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/rafa_copy/README.txt b/Chapter06/BONUS_2_CopyFileBenchmark/rafa_copy/README.txt new file mode 100644 index 0000000..ac6d0fc --- /dev/null +++ b/Chapter06/BONUS_2_CopyFileBenchmark/rafa_copy/README.txt @@ -0,0 +1 @@ +In this folder we copy the file used by benchmark. \ No newline at end of file diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/rafa_org/Rafa Best Shots.mp4 b/Chapter06/BONUS_2_CopyFileBenchmark/rafa_org/Rafa Best Shots.mp4 new file mode 100644 index 0000000..166777e Binary files /dev/null and b/Chapter06/BONUS_2_CopyFileBenchmark/rafa_org/Rafa Best Shots.mp4 differ diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/results/benchmark.png b/Chapter06/BONUS_2_CopyFileBenchmark/results/benchmark.png new file mode 100644 index 0000000..e91d5bd Binary files /dev/null and b/Chapter06/BONUS_2_CopyFileBenchmark/results/benchmark.png differ diff --git a/Chapter06/BONUS_2_CopyFileBenchmark/src/main/java/modern/challenge/Main.java b/Chapter06/BONUS_2_CopyFileBenchmark/src/main/java/modern/challenge/Main.java new file mode 100644 index 0000000..3f8042d --- /dev/null +++ b/Chapter06/BONUS_2_CopyFileBenchmark/src/main/java/modern/challenge/Main.java @@ -0,0 +1,246 @@ +package modern.challenge; + +import java.nio.MappedByteBuffer; +import java.io.OutputStream; +import java.io.InputStream; +import java.io.BufferedInputStream; +import java.io.BufferedOutputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.FileOutputStream; +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.FileChannel; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.nio.file.StandardOpenOption; +import java.util.EnumSet; +import static java.nio.file.LinkOption.NOFOLLOW_LINKS; +import java.util.Random; +import java.util.concurrent.TimeUnit; +import org.openjdk.jmh.annotations.Benchmark; +import org.openjdk.jmh.annotations.BenchmarkMode; +import org.openjdk.jmh.annotations.Fork; +import org.openjdk.jmh.annotations.Measurement; +import org.openjdk.jmh.annotations.Mode; +import org.openjdk.jmh.annotations.OutputTimeUnit; +import org.openjdk.jmh.annotations.Scope; +import org.openjdk.jmh.annotations.State; + +@OutputTimeUnit(TimeUnit.SECONDS) +@BenchmarkMode(Mode.AverageTime) +@Fork(value = 1, warmups = 1) //, jvmArgsPrepend = {"-Djdk.net.usePlainSocketImpl=true"}) +@Measurement(iterations = 1, time = 1) +@State(Scope.Benchmark) +public class Main { + + private static final Path COPY_FROM = Paths.get("rafa_org/Rafa Best Shots.mp4"); + private static final Path COPY_TO = Paths.get("rafa_copy/"); + private static final int BUFFER_SIZE_KB = 4; + private static final int BUFFER_SIZE = BUFFER_SIZE_KB * 1024; + + private static final Random rnd = new Random(); + + @Benchmark + public static void fileChannelIndirectBuffer() { + + System.out.println("Using FileChannel and non-direct buffer ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (FileChannel fileChannel_from = (FileChannel.open(COPY_FROM, EnumSet.of(StandardOpenOption.READ))); + FileChannel fileChannel_to = (FileChannel.open(copyTo, EnumSet.of(StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)))) { + + // Allocate an non-direct ByteBuffer + ByteBuffer bytebuffer = ByteBuffer.allocate(BUFFER_SIZE); + + // Read data from file into ByteBuffer + while ((fileChannel_from.read(bytebuffer)) > 0) { + + //flip the buffer which set the limit to current position, and position to 0 + bytebuffer.flip(); + + //write data from ByteBuffer to file + fileChannel_to.write(bytebuffer); + + //for the next read + bytebuffer.clear(); + } + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void fileChannelDirectBuffer() { + + System.out.println("Using FileChannel and direct buffer ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (FileChannel fileChannel_from = (FileChannel.open(COPY_FROM, EnumSet.of(StandardOpenOption.READ))); + FileChannel fileChannel_to = (FileChannel.open(copyTo, EnumSet.of(StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)))) { + + // Allocate an direct ByteBuffer + ByteBuffer bytebuffer = ByteBuffer.allocateDirect(BUFFER_SIZE); + + // Read data from file into ByteBuffer + while ((fileChannel_from.read(bytebuffer)) > 0) { + + //flip the buffer which set the limit to current position, and position to 0 + bytebuffer.flip(); + + //write data from ByteBuffer to file + fileChannel_to.write(bytebuffer); + + //for the next read + bytebuffer.clear(); + } + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void fileChannelTransferTo() { + + System.out.println("Using FileChannel.transferTo method ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (FileChannel fileChannel_from = (FileChannel.open( + COPY_FROM, EnumSet.of(StandardOpenOption.READ))); + FileChannel fileChannel_to = (FileChannel.open(copyTo, EnumSet.of( + StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)))) { + + fileChannel_from.transferTo(0L, fileChannel_from.size(), fileChannel_to); + + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void fileChannelTransferFrom() { + + System.out.println("Using FileChannel.transferFrom method ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (FileChannel fileChannel_from = (FileChannel.open( + COPY_FROM, EnumSet.of(StandardOpenOption.READ))); + FileChannel fileChannel_to = (FileChannel.open(copyTo, EnumSet.of( + StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)))) { + + fileChannel_to.transferFrom(fileChannel_from, 0L, (int) fileChannel_from.size()); + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void fileChannelMap() { + + System.out.println("Using FileChannel.map method ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (FileChannel fileChannel_from = (FileChannel.open(COPY_FROM, EnumSet.of(StandardOpenOption.READ))); + FileChannel fileChannel_to = (FileChannel.open(copyTo, EnumSet.of(StandardOpenOption.CREATE_NEW, StandardOpenOption.WRITE)))) { + + MappedByteBuffer buffer = fileChannel_from.map( + FileChannel.MapMode.READ_ONLY, 0, fileChannel_from.size()); + + fileChannel_to.write(buffer); + buffer.clear(); + + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void bufferedStreamIO() { + + System.out.println("Using buffered streams and byte array ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + File inFileStr = COPY_FROM.toFile(); + File outFileStr = copyTo.toFile(); + + try (BufferedInputStream in = new BufferedInputStream( + new FileInputStream(inFileStr)); BufferedOutputStream out + = new BufferedOutputStream(new FileOutputStream(outFileStr))) { + + byte[] byteArray = new byte[BUFFER_SIZE]; + int bytesCount; + while ((bytesCount = in.read(byteArray)) != -1) { + out.write(byteArray, 0, bytesCount); + } + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void bufferedStreamByteArray() { + + System.out.println("Using un-buffered streams and byte array ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + File inFileStr = COPY_FROM.toFile(); + File outFileStr = copyTo.toFile(); + + try (FileInputStream in = new FileInputStream(inFileStr); + FileOutputStream out = new FileOutputStream(outFileStr)) { + + byte[] byteArray = new byte[BUFFER_SIZE]; + int bytesCount; + while ((bytesCount = in.read(byteArray)) != -1) { + out.write(byteArray, 0, bytesCount); + } + } catch (IOException ex) { + System.err.println(ex); + } + } + + @Benchmark + public static void filesCopyPathToPath() { + + System.out.println("Using Files.copy (Path to Path) method ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try { + Files.copy(COPY_FROM, copyTo, NOFOLLOW_LINKS); + } catch (IOException e) { + System.err.println(e); + } + } + + @Benchmark + public static void filesCopyIStreamToPath() { + + System.out.println("Using Files.copy (InputStream to Path) ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (InputStream is = new FileInputStream(COPY_FROM.toFile())) { + Files.copy(is, copyTo); + } catch (IOException e) { + System.err.println(e); + } + } + + @Benchmark + public static void filesCopyPathToOStream() { + + System.out.println("Using Files.copy (Path to OutputStream) ..."); + + Path copyTo = COPY_TO.resolve("Rafa Best Shots " + rnd.nextInt() + ".mp4"); + try (OutputStream os = new FileOutputStream(copyTo.toFile())) { + Files.copy(COPY_FROM, os); + } catch (IOException e) { + System.err.println(e); + } + } + + public static void main(String[] args) throws IOException { + + org.openjdk.jmh.Main.main(args); + } +} \ No newline at end of file diff --git a/Chapter06/README.md b/Chapter06/README.md index d66c864..8eb91c4 100644 --- a/Chapter06/README.md +++ b/Chapter06/README.md @@ -1,3 +1,3 @@ -# Java I/O - Paths, files, buffers, scanning and formatting +# Java I/O - Paths, files, buffers, scanning and formatting This chapter includes 20 problems that involve Java I/O for files. From manipulating, walking and watching paths to streaming files and efficient ways for reading/writing text and binary files, we will cover a hand of problems that are a must in the arsenal of any Java developer. diff --git a/README.md b/README.md index 0419ea5..aab522f 100644 --- a/README.md +++ b/README.md @@ -1,6 +1,9 @@ + + + # Java Coding Problems -Java Coding Problems +Java Coding Problems This is the code repository for [Java Coding Problems ](https://www.packtpub.com/programming/java-coding-problems?utm_source=github&utm_medium=repository&utm_campaign=), published by Packt. @@ -68,3 +71,7 @@ He is the author of several books, videos, and dozens of articles related to Jav [Click here](https://docs.google.com/forms/d/e/1FAIpQLSdy7dATC6QmEL81FIUuymZ0Wy9vH1jHkvpY57OiMeKGqib_Ow/viewform) if you have any feedback or suggestions. +### Download a free PDF + + If you have already purchased a print or Kindle version of this book, you can get a DRM-free PDF version at no cost.
Simply click on the link to claim your free PDF. +

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