The Class DataInputStream is baselly handle a primitive type data types   Example 1 write a programme to input your Firstname,lastname input them. [crayon-647e522cb6ba4586041479/] Example 2 write a programme to input your num1,num2 and calculate the total. [crayon-647e522cb6baa357988273/] I have attached the video tutorial below it will help you  to do this  step by step.