Improve generator

[dowglaz]

Create a .java solution generator to accelerate coding setup.

Given: filename, returnType and args as arguments:

• Creates a $filename.java file (force camel case on $filename)
• Imports java.util.*
• Write a public method named solution returning $returnType and receiving $args
• Write the class name in the file with $filename
• Write the static main method in the file
• Puts a System.out.println(new className.solution($args))
• Puts an integer reading in the main method if options.readInt
• Puts an array of integer reading in the main method if options.readArray contains int
• Puts a printArray method in the class
• Puts a string reading in the main file if options.readString
• Puts a char reading in the main file if options.readChar