How to get first value of the key from the file?

I am trying to get the first value of the key but it is printing two values. Can anyone please suggest me.

Properties props = new Properties();
props.load(new FileReader(configFilePath));

String appName = props.getProperty("app","env");
System.out.println("AppName:"+appName);

I need to print only "abc" as applications and environment as "ab".Please suggest.

From the docs, you can see that props.getProperty(String propertyName) will get your value for the propertyName key. What you did was you used props.getProperty(String propertyName, String defaultValue), which won't get environment unless applications is not found.

I will assume you want both of them. For this, you should do the following:

String appName = props.getProperty("applications");
String[] appNameSplitted = appName.split(","); // split after comma
// to get 'abc', do
String firstAppName = appNameSplitted[0];
// to get 'tds' do
String secondAppName = appNameSplitted[1];

The same goes for environment:

String envName = props.getProperty("environment");
String[] envNameSplitted = envName.split(","); // split after comma
// to get 'ab', do
String firstEnvName = envNameSplitted[0];
// to get 'bc' do
String secondEnvName = envNameSplitted[1];

EDIT

Based on your comment, if you want now to get abc.csv from what you have, I suggest you use StringBuilder (docs)

Basically, you want to take your splitted string and append to it the .csv string. This is done as follows:

StringBuilder file1 = new StringBuilder();
file1.append(appNameSplitted[0])
     .append(".csv");
// the same goes for all the other options
// to get the string value of file1, use
file1.toString(); // this is now "abc.csv"

For the last comment, simply do:

StringBuilder file2 = new StringBuilder();
file2.append(appNameSplitted[1])
     .append("-")
     .append(envNameSplitted[1])
     .append(".csv");