Java I/O Tutorial
Java comes with many handy I/O classes to support the input and output through bytes stream and file system. Here’s a list of the Java I/O examples including file, temporary file and directory manipulation, encoding, serialized and also compression with zip or Gzip.
Happy learning Java I/O 🙂
File
List of the File examples to show the use of Java I/O to create, read, write, modify file and get the file’s information.
- Create a file
- Construct file path
- Set the file permission
- Read file with BufferedInputStream
- Read file with BufferedReader
- Write file with FileOutputStream
- Write file with BufferedWriter
- Append content to file
- Delete a file
- Delete files with certain extension only
- Find files with certain extension only
- Rename a file
- Copy a file
- Move a file to another directory
- Get the file creation date
- Get the file last modified date
- Change the file last modified date
- Make a file read only
- Get file size
- Get the filepath of a file
- Get the total number of lines of a file
- Check if a file exists
- Check if a file is hidden
- Read UTF-8 encoded data from a file
- Write UTF-8 encoded data into a file
- Assign file content into a variable
- Generate a file checksum value
- Convert File into an array of bytes
- Convert array of bytes into File
- Convert String to InputStream
- Convert InputStream to String
- Convert File to Hex
- Get total of free disk space in your partition or volume
File Serialization
Take any object that implements the Serialization interface, convert it into bytes and store it into file; The file can be fully restore back to the original object later.
File Compression
File compression examples, ZIP and GZip.
- Compress files in ZIP format
- Decompress files from a ZIP file
- Compress a file in GZIP format
- Decompress file from GZIP file
- Compress serialized object into file
- Decompress serialized object from a Gzip file
Temporary File
List of the temporary file manipulation examples.
- Create a temporary file
- Write data to temporary file
- Delete temporary file
- Get the temporary file path
Directory
List of the directory manipulation examples.
- Create directory
- Delete directory
- Copy directory
- Traverse /List a directory structure
- Check if directory is empty
- Get the current working directory
Console IO
List of the Console IO examples.
Awesome, this post has almost everything covered around file I/O along with a lot of supplement stuff. However, addressing a few more topics like md5/sha1 hashing, retrieving file time-stamp would have made it more meaningful.
sir please add concurrent collection as well
thanks
thank you
Thanks for your tutorials , I wanna say that they are useful for me
Thank you very much mkyong! You helped me and other guys so much!
Hi all,
I am a new to java. I am trying to set up the environment with Java, git, Jenkins and maven by mentioning the IP address of linux VM. I have written a code to connect to VM, create folders, and move files to folders. Now I want to install all Java and others software programmatically. Ib tried to install Java using yum -y install java-1.7.0. There is no error but then Java is not installed. Please suggest what needs to be done so that Java gets installed and java_home path is set programmatically.
Any help is appreciated.
Thanks and regards,
Karthik
Nice tutorial
nice
please share a code for saerch a file (in which given “string” would be available) by given string and then copy searched file to destination folder.
You site is really helpful but I am looking for something else. I have a text file. In this file, I have to read upto certain symbol break that input file into multiple output file ex
>T0646 OR188, , 93 residues
MQEERKKLLEKLEKILDEVTDGAPDEARERIEKLAKDVKDELEEGDAKNMIEKFRDEMEQ
MYKDAPNAVMEQLLEEIEKLLKKAGSLVPRGSY
>T0647 HR5514A, , 157 residues
MTERLSAEQIKEYKGVFEMFDEEGNGEVKTGELEWLMSLLGINPTKSELASMAKDVDRDN
KGFFFNCDGFLALMGVYHEKAQNQESELRAAFRVFDKEGKGYIDWNTLKYVLMNAGEPLN
EVEAEQMMKEADKDGDRTIDYEEFVAMMTGESFKLIQ
you can see “>” symbol which I need to start and end for 1 and another file for another.
How can Ido with java
pleas send any project which is don by java programing by my email address
thank you !
thank you
Hi Can u please tell me how we can convert a word file to pdf using java
Apache POI
learn latest java tutorial
http://www.javatportal.com
Hi , I am new in Java , i need help
How can i hide my .JSP file in browser …
Example: My website is : http://www.abc.com/Student ( i want to show this link for every pages).. not like http://www.abc.com/student/login.jsp
Regards
hi sir,
How can i convert pdf file into epub using java?
thanks
I need to display the tiff and pdf image file on web browser using jsp servlet. The specific image selection manual to the jsp page. For example. one.tif or five.pdf etc., please anyone give me the code.
Hello,
I have one doubt about OutputStream in java.
I want to use single object of fileoutputstream into multiple java files.
Please help me to use single object of fileoutputstream into multiple java files.
Do You Know How To Create A Shortcut File(Windows-.lnk) Using Java??
do you have the source code Twofish using java???
please help me,,,
[email protected]
Excellent !!! Thank you very much!
how ternary operator used in java
Ternary operator is best alternative for if-else
For example:
int age=19;
String canvote=(age>=18)?”yes,you can vote”:”you cant vote”;
System.out.println(canvote);
OUTPUT:
There are three part of ternary operator:
(Condition)?truepart:falsepart
1. Condition- any boolean expression
2. True part- if condition evalute true so assign this value left hand side.
3. False part- if condition evalute false so assign this value left hand side.
OUTPUT: yes, you can vote
Thanks!
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Hi , i have two doubts in exception handling
1).which scenario we use try/catch block and throws in same program?
2)suppose catch cann’t handle the exception what we do?
Please help me this.
throws are used that we know the exception can occur but doesn’t catch the exception
I <3 you, you rock.
Your site is absolutely wonderful…..very helpful indeed..thanks a ton!!!
nice site ,…….thankyou …..bro…
Thank you for share all those tutorials. I’m just getting started with Java Netbeans and this is the best that I’ve found . . .
Nice
Thax . & i wish u all the best !