Skip to content
Gallery
csHjavaA-2019
about this document
revision
traverse and process
standard algorithms
Parallel Arrays
read text files
write text files
CSV files
Letter frequency
development workflow
indices
More
Share
Explore
write text files

icon picker
subject list

open, write and close a text file

developer task

study the project notes on this page to understand how to write values to a simple text file
fork the project and test the code with some text values
create a new project to implement a solution to the exercise at the foot of this page
you should have read the general notes about writing a file

program requirement: write a text file (example)

ask a user to type a series of five subject names, store the names in an array
write the array values to a text file

text file: output

the results file should contain a list with a value on each line
stored in text format with newline character after each line except for the last line

java code constructs to write to a file


open file
• choose a name for the file and open it for writing
write (a line) to file
• use fileWriter with print to output a line of text
• a newline should be added after each line of text, apart from the last line
this code will be nested within a loop to repeat for each value in the array
close file

program code


⁠
Loading…
⁠
⁠

exercise: binary headings

write a list to a text file for the binary place headings for 8 bite two’s complement starting with -128
create a new repl project
enter the values using the keyboard
store the number values in an integer array
write them to a text file

the results file should end up like this

developer task
program requirement: write a text file (example)
text file: output
java code constructs to write to a file
program code
exercise: binary headings
Want to print your doc?
This is not the way.
Try clicking the ⋯ next to your doc name or using a keyboard shortcut (
CtrlP
) instead.