Read and write to properties file in Java

This short article shows you how to read and write value to properties file in Java.


1. Import java.util.Properties


import java.util.Properties;


2. The code snippet to write to properties file as below.

try (OutputStream out = new FileOutputStream(“”)) {

                     Properties properties = new Properties();

                     properties.setProperty(“name”, “mingman”);

3. The snippet to read to properties file as below.

try (InputStream in = new FileInputStream(“”)) {

                     Properties prop = new Properties();


                     System.out.println(“####Properties.getProperty usage####”);




                     System.out.println(“####Properties.stringPropertyNames usage####”);

                     for (String property : prop.stringPropertyNames()) {

                           String value = prop.getProperty(property);

                           System.out.println(property + “=” + value);


This code is extracted from

You can also download a single solution from The sample file name is My MSN ID is


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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