Java variable names must start with one of the following characters:

• Letter
• Underscore
• Dollar sign

After the first character, Java variable names can contain numbers.

Java variable names cannot be one of the Java reserved words:

• assert
• boolean
• break
• byte
• case
• catch
• char
• class
• const
• continue
• default
• do
• double
• else
• extends
• false
• final
• finally
• float
• for
• goto
• if
• implements
• import
• instanceof
• int
• interface
• long
• native
• new
• null
• package
• private
• protected
• public
• return
• short
• static
• strictfp
• super
• switch
• synchronized
• this
• throw
• throws
• transient
• true
• try
• void
• volatile
• while

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