Comments on: How to read properties file in Java.

By: Jakobi Freeman

Jakobi Freeman — Wed, 30 Nov 2011 18:47:42 +0000

Nice, but how do you read integer values? Or doubles, floats, etc… Can it only read string values?

By: yem

yem — Fri, 25 Nov 2011 11:16:05 +0000

thanks friend

By: armejaap

armejaap — Thu, 10 Nov 2011 13:55:12 +0000

@Rashim

I think you have to escape “:” and “=”. So the new line in your properties file would be:
targetUrl=https\://foobar:9080/foo
Hope this helps.

By: Priya

Priya — Sat, 15 Oct 2011 06:42:21 +0000

Cna we read from properties file without using InputStream. I mean I want asingle line access to key in properties file through my swings program.

By: saia

saia — Fri, 24 Dec 2010 05:57:21 +0000

Hai
provide more examples

By: SANDHYARAJ

SANDHYARAJ — Fri, 24 Dec 2010 05:56:19 +0000

Hai Friends,

i need more clarification regarding the properties file and how to retrive the values from the properties to a java file.
and provide more examples

By: shashi kanth

shashi kanth — Mon, 06 Dec 2010 09:23:54 +0000

Hi Zaheer,
it’s excellent one. i was trying with file input stream as shown below, but application unable to catch the file. getting file not found exception, after replacing these with your above eg. now it is working fine. thank you very much.
and may i know the fault in my below code, y i am getting errror ??

File propsFile = new File(filePath);
FileInputStream fileInputStream = new FileInputStream(propsFile);
prop.load(new FileInputStream(“db.properties”));
System.out.println(“Driver Name : “+prop.getProperty(“driverName”));

By: Zaheer

Zaheer — Thu, 09 Jul 2009 15:27:48 +0000

Rashmi, you don’t have to do anything special to read the URL from properties file. Follow the example I provided and you should be able to read the URL from the file. If you can share your code I’ll be glad to help you with malformed exception.
To read an integer value you read the value from the file as String and then convert that value to an int using valueOf method of the Integer class. In my example I read numberOfFiles from the file, here is how you can convert that to an int.
String numberOfFiles = prop.getProperty(“NumberOfFiles”);
int number = Integer.valueOf(numberOfFiles);

Hope this helps, otherwise feel free to contact me directly.

By: Rashmi

Rashmi — Wed, 08 Jul 2009 20:34:34 +0000

Is there a different format for reading URL values from the properties file?

My property file has

targetUrl=https://foobar:9080/foo

I am getting a malformed exception error. Do you think I am missing something?

Also, how do we read integer values from the properties file?

By: Prabhat Atri

Prabhat Atri — Wed, 23 Jul 2008 10:01:07 +0000

For web applications we can put the .properties file inside your src folder so that after build all the properties file gets reflected/copied to /WEB-INF/classes folder.

To access you can use following code snippet:

Properties props = new Properties();
try
{
ClassLoader cl = UploadDealDocs.class.getClassLoader();
InputStream fin = cl.getResourceAsStream.(“./config.properties”);
props.load(fin);
uploadedFilePath = props.getProperty(“localDrivePath”);
fin.close();
}
catch (Exception e1)
{
LOG.info(“FILE CANNOT BE READ”);
e1.printStackTrace();
}

Cheers