in java please show multiple examples of each or in one code preferably, with comments explaining. Studying for test :) just need examples. Thanks! This is on input and output files and try and catch mainly.

Know how to read and write files line by line Know how to create a try catch Know how to create an ArrayList and add items Know how to find the most frequent item in a list Have an understanding of Unicode and how encoding works o Have a basic understanding of how to implement a Caesar Cipher using Unicode