Read Properties File in Java With ResourceBundle

There are a number of ways to load and read properties file from Java, but the easiest and most straightforward is using the ResourceBundle class.

First, you need to create a properties file under resources folder. In a typical Maven project, this looks like the following

 In this example, the properties file is called config.properties

The content of the properties file is in the format of name=value

Example:

browser=chrome

Related:

• How to create a file in Java
• How to write to a file in Java
• How to get current working directory in Java

In a Java class, we can use the ResourceBundle class to read from the properties file:

public class ReadPropertiesFile {

    private static ResourceBundle rb = ResourceBundle.getBundle("config");

    public static void main(String[] args) {
        String browser = rb.getString("browser");
        System.out.println(browser);
    }
}

Output:

chrome