Information Technology Tips

As you know, if you would like to sort array, you should use Arrays.sort method. But if you would like to get sorted index, you should use your a brain a bit. In this post, I will show you the code snippet for getting sorted array index. The following is the simplest way to get sorted index. The disadvantages of the following code are autoboxing in compare process and returned array type is not int[] but Integer[]. /** * The most common & general way. But this method use autoboxing and need Integer[] not int[]. */ public static final <T>void sort(T[] array, Comparator<T> comparator, Integer[] sorted) { Arrays.sort(sorted, (i1, i2) -> comparator.compare(array[i1], array[i2])); } To solve these advantage, I wrote following array sort helper class which can get sorted array index as int[] type. You can call getSortedIndex method with source array and comparator as the arguments. The code uses lambda expression which was introduced in Java 8. packa

Here is the code for count up string given as a second parameter appears on string given as a first parameter. public final static int countOccurrence(String src, String search) { for(int count = 0, fromIndex = 0;;) { fromIndex = src.indexOf(search, fromIndex); if(fromIndex < 0) return count; fromIndex++; count++; } }

Introduction In this post, I will demonstrate how to read image metadata using BitmapMetadata class in C#. Before staring explanation, we should notice there are two namespaces that can handle image in C#. System.Drawing namespace: I tested in this post System.Windows.Media.Imaging In this post, we will use classes under System.Windows.Media.Imaging. Code for Reading Image Metadata Actually code itself is quite simple :) Please see code below. using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Windows.Media.Imaging; using System.Diagnostics; namespace MetadataExample { public static class ReadImageMetadataExample { public static void a(string fileName) { var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); var img = BitmapFrame.Create(fs); var metadata = img.Metadata as BitmapMetadata; Debug.WriteLine("=== metadata ===

In this post, I will show you the code snippet for extracting jpeg image exif metadata using metadata-extractor . Code package com.dukesoftware.image; import com.drew.imaging.ImageMetadataReader; import com.drew.imaging.ImageProcessingException; import com.drew.metadata.Directory; import com.drew.metadata.Metadata; import com.drew.metadata.Tag; import java.io.File; import java.io.IOException; public class MetaDataExtractor { public static void main(String[] args) throws IOException { printMetaData(new File("c:/temp/metadata_eample.jpg")); } private static void printMetaData(File file) throws IOException { try { Metadata drewmetadata = ImageMetadataReader.readMetadata(file); for (Directory directory : drewmetadata.getDirectories()) { System.out.println("==="+directory.getClass().getName()+"==="); for (Tag tag : directory.getTags()) { System.out.p

Recently I have been investigating image library in Java. In this post, I will show you the code snippet for extracting jpeg image exif metadata using Sanselan . Code package com.dulesoftware.image; import java.io.File; import java.io.IOException; import java.util.List; import org.apache.sanselan.ImageReadException; import org.apache.sanselan.Sanselan; import org.apache.sanselan.common.IImageMetadata; import org.apache.sanselan.common.ImageMetadata.Item; import org.apache.sanselan.formats.jpeg.JpegImageMetadata; import org.apache.sanselan.formats.tiff.TiffField; import org.apache.sanselan.formats.tiff.TiffImageMetadata; public class SanselanMetadataExample { public static void main(String[] args) throws Exception { printMeatadata(new File("c:/temp/metadata_eample.jpg")); } public static void printMeatadata(File file) throws ImageReadException, IOException { IImageMetadata sanselanmetadata = Sanselan.getMetadata(file); if (sanselan