Exercise 16: Arguments

Here is a program which prints out various information about each of its two arguments. You will see that it has two very similar sections of code. Refactor the program by adding a new method called describe which contains this common code, and then make two calls to it to replace the original code.

// Print out information about the two arguments. class Arguments { public static void main(String[] args) { Arguments program = new Arguments(); if (args.length != 2) { System.err.println("Usage: java Arguments x y"); System.exit(1); } program.print(args[0], args[1]); } // Print out information about the arguments. void print(String arg0, String arg1) { System.out.println("Argument 0 is " + arg0); System.out.println("It has " + arg0.length() + " characters"); System.out.println("In upper case, it is " + arg0.toUpperCase()); System.out.println("Argument 1 is " + arg1); System.out.println("It has " + arg1.length() + " characters"); System.out.println("In upper case, it is " + arg1.toUpperCase()); } }

Hint

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