Properties File in Java: Configuration, Reading Data, and Methods Explained
📘 Properties File in Java A Properties file is a configuration file used to store application settings—most commonly database credentials—in the form of key-value pairs. It helps separate configuration data from application logic, making the application easier to maintain and modify. 🔑 Format of a Properties File Properties db.url=jdbc:mysql://localhost:3306/testdb db.username=root db.password=admin 📦 Reading a Properties File in Java To read data from a properties file, Java provides the Properties class, which is available in the java.util package. Required Packages: java.util java.io 🧩 Steps to Read a Properties File Create an object of the Properties class Open the file using FileReader Load the key-value pairs into the Properties object Retrieve values using keys 🔧 Important Methods of Properties Class 🔹 load() Method Used to load key-value pairs from a file into the Properties object. void load(FileReader fr) throws IOException 📌 This method belongs to the Properties cla...