How to use Java property files?

Question

I have a list of key/value pairs of configuration values I want to store as Java property files, and later load and iterate through.

Questions:

• Do I ne

Answer 1

1) It is good to have your property file in classpath but you can place it anywhere in project.

Below is how you load property file from classpath and read all properties.

Properties prop = new Properties();
InputStream input = null;

try {

    String filename = "path to property file";
    input = getClass().getClassLoader().getResourceAsStream(filename);
    if (input == null) {
        System.out.println("Sorry, unable to find " + filename);
        return;
    }

    prop.load(input);

    Enumeration e = prop.propertyNames();
    while (e.hasMoreElements()) {
        String key = (String) e.nextElement();
        String value = prop.getProperty(key);
        System.out.println("Key : " + key + ", Value : " + value);
    }

} catch (IOException ex) {
    ex.printStackTrace();
} finally {
    if (input != null) {
        try {
            input.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2) Property files have the extension as .properties