1. Reading and Writing Text Files
Input/Output I/O Class Chapter 11

2. Streams Streams are defined as a sequence of Data
Input Stream is used to read data from a source
Output Stream is used to write data to a destination

3. Java Class Libraries Required for I/O Streams
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;

4. Scanner A Scanner class object is used to read input from a disk file.
Scanner relies on the File class to read and write data to files.

5. How to Read files using Scanner and File objects:
Construct a File object with the name of the input file: File inputFile = new File(“file.txt”);
Use the File object to construct a Scanner object Scanner in = new Scanner(inputFile);
Create a text file with content and save the file with a .txt extension.

6. How to Read files using Scanner and File objects:
3. Process the stream to read text from the input file (“file.txt”) while(in.hasNextLine()) {
String content = in.nextLine(); System.out.print(content); }

7. Class Practice Problem Create a Java Class to read contents of a file.
Create a class:FileStreams
Add a java class: ReadWrite.java
Add required libraries listed on slide3
Construct a File object for streaming data
Construct a Scanner object for receiving file content
Write a while loop to get file data and send to the monitor(S.O.P)
while(in.hasNext()) { String content=in.nextLine(); System.out.println(content); }

8. Sample Code