Java - read and write Properties class

Java - Properties

Properties is a subclass of Hashtable.

It is used to maintain lists of values in which the key is a String and the value is also a String.

The Properties class is used by many other Java classes. For example, it is the type of object returned by System.getProperties( ) when obtaining environmental values.

Example:

token.properties

      ServerAddress=192.168.3.1

      ServerPort=80

      ThreadCount=5

ReadWriteProperties.java

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.util.Enumeration;

import java.util.Properties;

public class ReadWriteProperties {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

ReadWriteProperties readWriteProperties = new ReadWriteProperties();

try {

readWriteProperties.readProperties();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public void readProperties() throws FileNotFoundException, IOException{

Properties props = new Properties();

props.load(new FileInputStream("C:\\Development\\Workspace\\token.properties"));

for (Enumeration<?> e = props.propertyNames(); e.hasMoreElements(); ) {

    String name = (String)e.nextElement();

    String value = props.getProperty(name);

    // now you have name and value

    if (name.startsWith("ServerAddress")) {

        System.out.println("Server Address is available");

    }

}

}

}