I would like to have a dynamic way of passing in parameters to a java main method call which is done via the Command Line(cmd) to a Runnable JAR file. At the moment my main() method takes 6 parameters and sets each one to a variable before calling another method with those variables passed in.
What id like is a way to give a user the ability to pass 5 or less paramters to the command line and have it safely handle the missed parameter by setting it to null or an empty string("") value.
For example, if I ran the command below, it should know to set the missing parameters I have not specified(clientName and outputFolder), to an empty String.
java -Xmx1024m -jar MainApp.jar "Summary" **<missing>** "2015-06-07" "https://12345.bp.com/bp/" "c:\\Parameters.txt" **<missing>**
Here is the code I have for my main method:
public static void main(String[] args) {
try {
String dType = args[0];
String clientName = args[1];
String cycleString = args[2];
String mspsURL = args[3];
String inputFile = args[4];
String outputFolder = args[5];
System.out.println("**Main Parameters passed**");
for(String x : args) {
System.out.println(x);
}
runLogic(dType, clientName, cycleString,
mspsURL, inputFile, outputFolder);
} catch(Exception ex) {
ex.printStackTrace();
}
}
Any help appreciated.
Suppose for example that last two are optional.