# 21 - File IO

Alina

# Goals

• Be able to read a file from the computer
• Be able to write to a file on the computer
• Know different file formats, be able to differentiate these formats

# Slides

# Useful links

File IO

• https://docs.oracle.com/javase/tutorial/essential/io/file.html
• https://docs.oracle.com/javase/7/docs/api/java/io/File.html
• https://www.w3schools.com/java/java_files.asp
• https://www.mkyong.com/java8/java-8-stream-read-a-file-line-by-line/
• https://www.baeldung.com/reading-file-in-java

# Homework

# Exercise 1

• Download and save a txt file http://norvig.com/big.txt
• Replace "Sherlock" name with your name
• Create and save the data to a new file with the name "Adventures of your name"

# Exercise 2

• Create 2 different files
• Read both of them
• Create a new file that has data from two files

# Exercise 3 (CSV)*

• Create a csv file with payments

id, amount, category, month, year
1, 10.0, Cafe, 10, 2019
2, 2100.0, Salary, 10, 2019
 ...

• find a library to work with csv files, parse the file
• add these data to your Bank Application

# Exercise 4 (XML)*

• Create an xml file with payments
• find a library to work with xml files, parse the file
• add these payments to your Bank Application

# Exercise 5 (json)*

• Create a json file with payments
• find a library to work with json files, parse the file
• add these payments to your Bank Application

# Exercise 6 (json)*

• Create few payments
• Save these payments as json file