The Class DataInputStream is baselly handle a primitive type data types   Example 1 write a programme to input your Firstname,lastname input them. [crayon-6473011aa472d619374673/] Example 2 write a programme to input your num1,num2 and calculate the total. [crayon-6473011aa4734911749086/] I have attached the video tutorial below it will help you  to do this  step by step.