![]() If the “name” value is not found, then “default value” is returned. For example, a default value can be specified along with the key in the getProperty( ) method-such as getProperty(“name”,“default value”). One useful capability of the Properties class is that you can specify a default property that will be returned if no value is associated with a certain key. If File is not present in default project root location, we will get an exception like below, We can provide a fully qualified path of the file as well. If this file exists, the list is loaded else IO exception is thrown. When the program executes, it first tries to load the list from a file called m圜onfig.properties. The program uses load( ) method to retrieve the list. Prop.load(new FileInputStream("m圜onfig.properties")) We can add comments in properties which will be ignored by java compiler.īelow is the java program for reading above property file. Sample properties file is shown below, which has information in key-value pair.Įach parameter is stored as a pair of strings, left side of equal (=) sign is for storing the name of the parameter (called the key), and the other storing the value.Ĭonfiguration: This is property file having my configurationįirst Line which starts with # is called comment line. Properties file provide flexibility in terms of configuration. The advantage of using properties file is we can configure things which are prone to change over a period of time without the need of changing anything in code. Things that you do not want to hard code in your Java code goes into properties files. Generally, these files are used to store static information in key and value pair. Java Properties files are amazing resources to add information in Java. Properties is a file extension for files mainly used in Java related technologies to store the configurable parameters of an application. Java Defining, Instantiating and Starting Thread.String buffer class and string builder class.Important methods of String class with example.Arrays - 2D array and Multi dimension array.Java Object Oriented Programming concepts.Compiling, running and debugging Java programs.Download and Install JDK, Eclipse (IDE).The resource folder is an abstraction defined in class loader to provide a path that can be accessed by code, it's a relative path, doesn't depend on where the project folder is and which platform the project reside. The class loader has special methods to query about resources folder, for example getResource, getResources, getResourceAsStream, etc. ![]() How to display full path of resources folder? If it's Web application, this folder also keeps CSS, Javascript, images for logo, button or background images. It can also store static files like image. Sometimes the configuration is in the format of property files. The resources folder is the default place where many Java libraries store their configuration files, usually XML based, for example the logging library Logback stores logback.xml in this folder by default. It gives all code in the project a uniform view of a place that stores non Java artifact files. The most important thing is the concept of resource is an abstraction, not a concrete path or folder structure. Many people are confused about this folder and don't know where it is or what kind of files should be stored in this folder. By default the process-resources phase will copy the files from $.
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