in JAVA

Questions Write a program that reads 3 numbers from a file these numbers can be positive or negative and the numbers in the input file will either be 1 digitor 3 digits, the number was positive and had 3 dias in it then you will need to print it in reverse, if it was positive with digit in it then you print it as it is, if it was negative with 3 digits in it then you need change it to a positive number and then print it in reverse, and if it was negative with 1 digit then you print it as a positive number. All the prints should be in an output file input file 3 265 utile 50 3