Simple Command Line Parser Class

Here is a very simple class that allows to parse command line parameters.

This is how this class can be used:

... CmdLineParameterReader cmdReader = new CmdLineParameterReader(); connParams.setHost(cmdReader.getParameterValue(argc,"-host")); ...

Hostname is saved in connParams class in this example.

You can pass hostname "myhost.net" as "-host myhost.net" or "-hostmyhost.net". Both cases are acceptable.


The class is defined as follows

package simple; public class CmdLineParameterReader { String parameterMark = ""; public CmdLineParameterReader(){ } public CmdLineParameterReader(String parameterMarker){ this.parameterMark=parameterMarker; } public String getParameterValue(String args[], String parameter) { String valOut = null; for(int i=0; i<args.length; i++){ if( args[i].startsWith(parameter) ){ if(args[i].equals(parameter)){ if( (i+1) < args.length && ! "".equals(parameterMark) && ! args[i+1].startsWith(parameterMark) ){ valOut = args[i+1]; } else { valOut = ""; } } else { valOut = args[i].substring(parameter.length()); } } } return valOut; } }