IO PACKAGE (Core JAVA)

·         java provides IO package to write program which can handle file as well as directory of system file

·         File class is used for basic operations. For e.g.,

1.       creating directory or folder

2.       deleting directory or folder

3.       to check existence of directory or folder

4.       to get path of directory or folder

5.       to check permission of directory or folder

·         some other basic classes are also available in IO package such as:

1.       File writer File reader:  It is used to read and write single character internally

2.       Buffer Reader and Buffer Writer: It is used to read and write Buffer of characters

3.       Object Input Stream and Object OutputStraem: It is used to read and write java object and instance

4.       Binary Input Stream and Binary Output Stream: It is used to read and write binary characters and executable files

5.       File Input Stream and File Output Stream: It is used for general purpose and is basically used in selenium

FILE WRITER CLASS

·         This class is used to write characters into a file after writing all the characters stream should be flushed using flush() method. After performing all the write operations the stream should be closed using close() method

NOTE: Generally flush() and close() will be written inside finally block

·         The File Reader class is used to read characters from the file. These characters are read by using read()

·         Read() will read the characters and stores as array of characters

·         Take input from keyboard (resume)