How to load/read properties file from java code

Below java class will enable us to load and read the properties file. In one of the previous tutorial we have written to the properties file so keeping that in mind once after we run this program we will get the desired output. For earlier tutorial please click here

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

public class LoadProperties {
    public static void main(String[] args) {
        Properties prop = new Properties();
        try {
            // load a properties file
            prop.load(new FileInputStream("config.properties"));

            // get the property value and print it out
            System.out.println(prop.getProperty("url"));
            System.out.println(prop.getProperty("username"));
            System.out.println(prop.getProperty("password"));
            // below line will print null as it doesn't exist
            System.out.println(prop.getProperty("will print null"));
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}

Output:

host IP Address
Amzi
passw0rd
null