And is this property file formatted in the standard way for a Java Properties file? If it is then you just use methods from the Properties class to load it and extract properties from it. Read the API documentation for that class both to find out the answer to my question and to find out how to use a Properties file.
And if the answer is no, you would be well advised to fix the file so the answer becomes yes.
Of course. But I would seriously recommend taking some time to read the documentation for Properties files. It answers all the questions you have asked here, including that one. Reading documentation is a useful skill for Java programmers and you'll find you can get things done much faster if you do that instead of just dumping your questions on a forum and waiting for random strangers to help you out.