How to read key value pair from a option file?

Question

I want to read key value pair from a option file in my application.I want to pass the value as command line argument like debug.

In debug-

-debug "option file path"

similarly i want to do the same thing in my key value pair

Content of Option file:

com.xxx.xxx.xxx.xxx.xxx/isjubula = false

so as debug here i want to pass

-isjubula " path"

so that my application can link to this file and could read its content.

Answer 1

What's the problem with :

public class MyClass{
    public static void main(String args[]) {

        if(args.length == 2 && args[0].equalsIgnoreCase("-isjubula")) {
            System.out.println(args[1]); //get the option
        }
        else {
           System.out.println("Illegal options");
        }
    }
}

You can provide option to the above program, while running it in the command line like bellow:

java MyClass -isjubula "/home/myconf.conf"

or

java MyClass -isjubula /home/myconf.conf

Edit:

No, there is still no facility like this. But one thing you should know, the way of taking debug option like mentioned here , is known as instrumentation . Generally instrumentation is totally platform dependant. But ideally, you should not use something in your code that will make it solely eclipse dependant!

Answer 2

Well, Java's main method can help you.. Read some documentation and refer to how one can use main method arguments array.

public static void main(String args[]) {
   String commandType = args[0];
   String command = args[1];

   if(commandType.equals("-isjubula"){
         //TODO: your code here...
   }

}

I have not added any null checks here.. please add them..

You can run this type of java progrm after compiling it and running it like java TestClass "-isjubula" "hello world";

Answer 3

I found a better way. Please see the code below.

    //code
    import java.util.Arrays;
    import java.util.List;
    public class Test {
        public static void main(String[] args) {
            List<String> st = Arrays.asList(args);
            if (st.contains("-zipfile")) {
                if (st.indexOf((st.indexOf("-zipFile") + 1)) != -1) {
                    // TODO your code
                }
            }

            if (st.contains("-priority")) {
                if (st.indexOf((st.indexOf("-priority") + 1)) != -1) {
                    // TODO your code
                }
            }
        }
    }