Question

Properties segmentClients = new Properties();
segmentClients.load(new FileInputStream(pathSegmentFile));

segmentClients.containsKey(strANI); //returns false / strANI = "9202599784"

file is like this:

# 01.2012
9202599784
9202599573
9208552001
9209374107
9209374949

strANI = 9202599784

why does it return false?

UPD: The problem was that file was in Unicode, after saving in ANSI started to work

Answer 1

segmentClients.containsKey("9202599784"); will return true because:

Each key and its corresponding value in the property list is a string.

proof, this test will pass:

Properties p = new Properties();
p.load(new StringBufferInputStream("# 01.2012\n" +
                "9202599784\n" +
                "9202599573\n"));
assertTrue(p.containsKey("9202599784"));