Write a ‘main’ method that examines its command-line arguments and calls the (static ) method displayHelp if the only argument is the class name. Note that displayHelp accepts no parameters otherwise, ‘main’ calls the (static ) method argsError if the number of arguments is less than four. argsError accepts the number of arguments (an integer ) as its parameter otherwise, ‘main’ calls the (static ) method processArgs, which accepts the command-line argument array as its parameter.

LANGUAGE: JAVA

CHALLENGE:

Write a ‘main’ method that examines its command-line arguments and
calls the (static ) method displayHelp if the only argument is the class name. Note that displayHelp accepts no parameters
otherwise, ‘main’ calls the (static ) method argsError if the number of arguments is less than four. argsError accepts the number of arguments (an integer ) as its parameter
otherwise, ‘main’ calls the (static ) method processArgs, which accepts the command-line argument array as its parameter.

SOLUTION:

public static void main(String[] args) {
   if(args.length==1){
      displayHelp();
   }else if(args.length < 4){
      argsError(args.length);
   }else{
      processArgs(args);
   }
}

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