Help please!

Can someone write the code below in Java Language? Its in Ruby.

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#Define a class RC4

class RC4

     #Define function initialize() with string as argument

     def initialize(str)

    

          #Begin

          begin

         

          #Display message

raise SyntaxError, "RC4: Key supplied is blank" if str.eql?('')

         

          #Call initialize_state()

          initialize_state(str)

         

          #Set q1 and q2 as 0

          @q1, @q2 = 0, 0

          end

         

     #End of function

     end

     #Define function encrypt!()

     def encrypt!(text)

    

          #Set index as 0

          index = 0

          #Loop until length of text

          while index < text.length

          #Set q1

          @q1 = (@q1 + 1) % 256

         

          #Set q2

          @q2 = (@q2 + @state[@q1]) % 256

         

          #State q1 and q2

          @state[@q1], @state[@q2] = @state[@q2], @state[@q1]

         

          #Set byte of text

text.setbyte(index, text.getbyte(index) ^ @state[(@state[@q1] + @state[@q2]) % 256])

         

          #Increment index

          index += 1

         

          #End of loop

          end

         

          #Text

          text

         

     #End of function

     end

     alias_method :decrypt!, :encrypt!

     #Define encrypt()

     def encrypt(text)

          #Call encrypt!()

          encrypt!(text.dup)

     end

     alias_method :decrypt, :encrypt

     private

     # Modified initial state

     INITIAL_STATE = (0..255).to_a

     # Define initialize_state()

     def initialize_state(key)

          #Set i, j as 0

          i = j = 0

          #Set state

          @state = INITIAL_STATE.dup

          #Set key length

          key_length = key.length

          #Loop until 256

          while i < 256

          #Compute j

j = (j + @state[i] + key.getbyte(i % key_length)) % 256

          @state[i], @state[j] = @state[j], @state[i]

         

          #Increment i

          i += 1

        end

     end

end

ComputerScienceExpert

(11)

Status NEW Posted 09 May 2017 08:05 AM My Price 9.00

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