This is a list of file formats used by computers, organized by type. Filename extensions are usually noted in parentheses if they differ from the file format name or. OBJ-Export01.png' alt='Obj File Reader' title='Obj File Reader' />Java Properties File java. Properties. Java properties file are used to store key value pair configuration. Properties class is used to work with properties file in java. In java properties file can be a normal property file with key value pairs or it can be an XML file also. In this java properties file example, we will show you how to write property file in both formats and then read properties from both the configuration files. We will also show you how to load properties file from classpath and how to read all the keys from the properties file. Java Properties File Example. File. Input. Stream. File. Not. Found. Exception. import java. File. Output. Stream. File. Reader. import java. File. Writer. import java. IOException. import java. Input. Stream. import java. Properties. import java. Set. public class Property. Files. Util. public static void mainString args throws IOException. String property. File. Name DB. properties. String xml. File. Name DB. xml. Property. Fileproperty. File. Name, xml. File. Name. Property. Fileproperty. File. Name, xml. File. Name. All. Keysproperty. File. Name, xml. File. Name. read. Property. File. From. Classpathproperty. File. Name. read property file from classpath. File. Name. throws IOException. Property. File. From. ClasspathString property. File. Name throws IOException. Properties prop new Properties. Property. Files. Util. Class. Loader. get. Resource. As. Streamproperty. Dthb97dQXq13rnf7xW6ASSHmTi51F5pP_iDEYB9PIgRLLNChvLazBWENuJ9XwhwVf=h900' alt='Obj File Reader' title='Obj File Reader' />File. Name. System. File. Name loaded from Classpath db. Propertydb. host. System. out. printlnproperty. Properties file in java. Java properties file read, load, write. Properties class getProperty, clear method, java properties xml, java config file. FILE SIGNATURES TABLE 14 September 2017. This table of file signatures aka magic numbers is a continuing workinprogress. I had found little information on this. Class nltk. corpus. AlignedSentCorpusView corpusfile, encoding, aligned, groupbysent, wordtokenizer, senttokenizer, alignedsentblockreader source. Find data file formats and file extensions that start with the letter S, or view thousands of file extensions and file formats in the complete list. GDImage_ObjReader.jpg' alt='Obj File Reader' title='Obj File Reader' />File. Name loaded from Classpath db. Propertydb. user. System. out. printlnproperty. File. Name loaded from Classpath db. Propertydb. pwd. System. File. Name loaded from Classpath XYZ prop. PropertyXYZ. File. Name. param xml. File. Name. throws IOException. All. KeysString property. File. Name, String xml. File. Name throws IOException. System. out. printlnStart of read. All. Keys. Properties prop new Properties. File. Reader reader new File. Readerproperty. File. Name. prop. loadreader. Setlt Object keys prop. Set. forObject obj keys. System. out. printlnproperty. File. Name Keyobj. String valueprop. Propertyobj. to. String. Input. Stream is new File. Input. Streamxml. File. Name. prop. From. XMLis. keys prop. Set. forObject obj keys. System. out. printlnxml. File. Name Keyobj. String valueprop. Propertyobj. to. String. Now free all the resources. System. out. printlnEnd of read. All. Keys. This method reads property files from file system. File. Name. param xml. File. Name. throws IOException. File. Not. Found. Exception. private static void read. Property. FileString property. File. Name, String xml. File. Name throws File. Not. Found. Exception, IOException. System. out. printlnStart of read. Property. File. Properties prop new Properties. File. Reader reader new File. Readerproperty. File. Name. prop. loadreader. System. out. printlnproperty. File. Name db. Propertydb. System. out. printlnproperty. File. Name db. Propertydb. System. out. printlnproperty. File. Name db. Propertydb. System. out. printlnproperty. File. Name XYZ prop. PropertyXYZ. Input. Stream is new File. Input. Streamxml. File. Name. prop. From. XMLis. System. File. Name db. Propertydb. System. out. printlnxml. File. Name db. Propertydb. System. out. printlnxml. File. Name db. Propertydb. System. out. printlnxml. File. Name XYZ prop. PropertyXYZ. Now free all the resources. System. out. printlnEnd of read. Property. File. This method writes Property files into file system in property file. Name. throws IOException. Property. FileString property. File. Name, String xml. File. Name throws IOException. System. out. printlnStart of write. Property. File. Properties prop new Properties. Propertydb. host, localhost. Propertydb. user, user. Propertydb. pwd, password. File. Writerproperty. File. Name, DB Config file. System. out. printlnproperty. File. Name written successfully. To. XMLnew File. Output. Streamxml. File. Name, DB Config XML file. System. out. printlnxml. File. Name written successfully. System. out. printlnEnd of write. Property. File. When we run above java properties file example program, write. Property. File method will write property files in both the format and it will be stored in the project root directory. Here are the property files created from write. Property. File method. DB. properties. DB Config file. Fri Nov 1. 6 1. 1 1. PST 2. 01. 2. db. UTF 8 standaloneno. DOCTYPE properties SYSTEM http java. DB Config XML filelt comment. Notice the comments in property file, it gets generated because we passed the comment also while writing the files. If we pass comment as null, there will be no comments in the property files. Here is the output of the above java properties file program. Start of write. Property. File. DB. properties written successfully. DB. xml written successfully. End of write. Property. File. Start of read. Property. File. DB. DB. properties db. DB. properties db. DB. properties XYZ null. DB. xml db. host localhost. DB. xml db. user user. DB. xml db. pwd password. DB. xml XYZ null. End of read. Property. File. Start of read. All. Keys. DB. properties Keydb. DB. properties Keydb. DB. properties Keydb. DB. xml Keydb. DB. Keydb. DB. xml Keydb. End of read. All. Keys. Exception in thread main java. Null. Pointer. Exception. PropertiesLine. Reader. LineProperties. java 4. Properties. load. Properties. java 3. Properties. loadProperties. Property. Files. Util. Property. File. From. ClasspathProperty. Files. Util. java 3. Property. Files. Util. Property. Files. Util. So when we just give the file name, it looks for the file in project root directory, same place where it stores the property files. But when we try to load property file from classpath, it throws Null. Pointer. Exception because it tries to load file from Classpath that is src directory of the project. So if we copy the properties file in the classes src directory, its able to load them and works fine. In that case output of the read. Property. File. From. Classpath method is. DB. properties loaded from Classpath db. DB. properties loaded from Classpath db. Chrome Driver For Selenium Webdriver Wait. DB. properties loaded from Classpath db. DB. properties loaded from Classpath XYZ null. Also notice that when we use the same Properties object to load other property file, we should clear its contents using clear method. If we pass any key for which there is no value stored in the properties object, it returns null. Thats all for properties file in java.