Java Related Information: 2019

Here is a list of MIME types, associated by type of documents, ordered by their common extensions.

Two primary MIME types are important for the role of default types:

text/plain is the default value for textual files. A textual file should be human-readable and must not contain binary data.
application/octet-stream is the default value for all other cases. An unknown file type should use this type. Browsers pay particular care when manipulating these files, attempting to safeguard the user to prevent dangerous behaviors.

IANA is the official registry of MIME media types and maintains a list of all the official MIME types. This table lists some important MIME types for the Web:

Extension	Kind of document	MIME Type
`.aac`	AAC audio	`audio/aac`
`.abw`	AbiWord document	`application/x-abiword`
`.arc`	Archive document (multiple files embedded)	`application/x-freearc`
`.avi`	AVI: Audio Video Interleave	`video/x-msvideo`
`.azw`	Amazon Kindle eBook format	`application/vnd.amazon.ebook`
`.bin`	Any kind of binary data	`application/octet-stream`
`.bmp`	Windows OS/2 Bitmap Graphics	`image/bmp`
`.bz`	BZip archive	`application/x-bzip`
`.bz2`	BZip2 archive	`application/x-bzip2`
`.csh`	C-Shell script	`application/x-csh`
`.css`	Cascading Style Sheets (CSS)	`text/css`
`.csv`	Comma-separated values (CSV)	`text/csv`
`.doc`	Microsoft Word	`application/msword`
`.docx`	Microsoft Word (OpenXML)	`application/vnd.openxmlformats-officedocument.wordprocessingml.document`
`.eot`	MS Embedded OpenType fonts	`application/vnd.ms-fontobject`
`.epub`	Electronic publication (EPUB)	`application/epub+zip`
`.gif`	Graphics Interchange Format (GIF)	`image/gif`
`.htm .html`	HyperText Markup Language (HTML)	`text/html`
`.ico`	Icon format	`image/vnd.microsoft.icon`
`.ics`	iCalendar format	`text/calendar`
`.jar`	Java Archive (JAR)	`application/java-archive`
`.jpeg` `.jpg`	JPEG images	`image/jpeg`
`.js`	JavaScript	`text/javascript`
`.json`	JSON format	`application/json`
`.jsonld`	JSON-LD format	`application/ld+json`
`.mid` `.midi`	Musical Instrument Digital Interface (MIDI)	`audio/midi` `audio/x-midi`
`.mjs`	JavaScript module	`text/javascript`
`.mp3`	MP3 audio	`audio/mpeg`
`.mpeg`	MPEG Video	`video/mpeg`
`.mpkg`	Apple Installer Package	`application/vnd.apple.installer+xml`
`.odp`	OpenDocument presentation document	`application/vnd.oasis.opendocument.presentation`
`.ods`	OpenDocument spreadsheet document	`application/vnd.oasis.opendocument.spreadsheet`
`.odt`	OpenDocument text document	`application/vnd.oasis.opendocument.text`
`.oga`	OGG audio	`audio/ogg`
`.ogv`	OGG video	`video/ogg`
`.ogx`	OGG	`application/ogg`
`.otf`	OpenType font	`font/otf`
`.png`	Portable Network Graphics	`image/png`
`.pdf`	Adobe Portable Document Format (PDF)	`application/pdf`
`.ppt`	Microsoft PowerPoint	`application/vnd.ms-powerpoint`
`.pptx`	Microsoft PowerPoint (OpenXML)	`application/vnd.openxmlformats-officedocument.presentationml.presentation`
`.rar`	RAR archive	`application/x-rar-compressed`
`.rtf`	Rich Text Format (RTF)	`application/rtf`
`.sh`	Bourne shell script	`application/x-sh`
`.svg`	Scalable Vector Graphics (SVG)	`image/svg+xml`
`.swf`	Small web format (SWF) or Adobe Flash document	`application/x-shockwave-flash`
`.tar`	Tape Archive (TAR)	`application/x-tar`
`.tif .tiff`	Tagged Image File Format (TIFF)	`image/tiff`
`.ts`	MPEG transport stream	`video/mp2t`
`.ttf`	TrueType Font	`font/ttf`
`.txt`	Text, (generally ASCII or ISO 8859-n)	`text/plain`
`.vsd`	Microsoft Visio	`application/vnd.visio`
`.wav`	Waveform Audio Format	`audio/wav`
`.weba`	WEBM audio	`audio/webm`
`.webm`	WEBM video	`video/webm`
`.webp`	WEBP image	`image/webp`
`.woff`	Web Open Font Format (WOFF)	`font/woff`
`.woff2`	Web Open Font Format (WOFF)	`font/woff2`
`.xhtml`	XHTML	`application/xhtml+xml`
`.xls`	Microsoft Excel	`application/vnd.ms-excel`
`.xlsx`	Microsoft Excel (OpenXML)	`application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`
`.xml`	`XML`	`application/xml` if not readable from casual users (RFC 3023, section 3) `text/xml` if readable from casual users (RFC 3023, section 3)
`.xul`	XUL	`application/vnd.mozilla.xul+xml`
`.zip`	ZIP archive	`application/zip`
`.3gp`	3GPP audio/video container	`video/3gpp` `audio/3gpp` if it doesn't contain video
`.3g2`	3GPP2 audio/video container	`video/3gpp2` `audio/3gpp2` if it doesn't contain video
`.7z`	7-zip archive	`application/x-7z-compressed`

Sorting of ListMapStringObject using Comparator

Sorting a List using Comparator

package com.yash;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/*
* Sort a List>
*/
public class ListMapStringObjectSorting {

public static void main(String[] args) {

   Map map1 = new HashMap();
   map1.put("name", "Y");
   map1.put("num", 1);

   Map map2 = new HashMap();
   map2.put("name", "A");
   map2.put("num", 3);

   Map map3 = new HashMap();
   map3.put("name", "D");
   map3.put("num", 2);

   Map map4 = new HashMap();
   map4.put("name", "C");
   map4.put("num", 5);

   List> mapList = new ArrayList>();
   mapList.add(map1);
   mapList.add(map2);
   mapList.add(map3);
   mapList.add(map4);

   Collections.sort(mapList, new Comparator> () {
   public int compare(Map m1, Map m2) {
   return ((Integer) m1.get("num")).compareTo((Integer) m2.get("num")); //ascending order
   //return ((Integer) m2.get("num")).compareTo((Integer) m1.get("num")); //descending order
   }
   });
   //Sort by number
   //[{num=1, name=Y}, {num=2, name=D}, {num=3, name=A}, {num=5, name=C}]
   System.out.println(mapList);

   Collections.sort(mapList, new Comparator>() {
   public int compare(final Map o1, final Map o2) {
   return ((String) o1.get("name")).compareTo((String) o2.get("name")); //ascending order
   }
   });
   //Sort by name
   //[{num=3, name=A}, {num=5, name=C}, {num=2, name=D}, {num=1, name=Y}]

   System.out.println(mapList);
}

}

Iterate a list - List> :

for (Map map : mapList) {
for (Map.Entry entry : map.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
System.out.println(key + " = " + value);
}

}