Java Fundamentals Hardening IO flow notes 45:io Stream exercises the case of storing data in a text file in a collection

1. Storing data in a text file in a collection

Requirement: Reads data from a text file (each behavior is a string of data) into the collection and iterates through the collection.

Analysis:
Through the meaning of the topic, we can know some of the following things,
The data source is a text file.
The destination is a collection.
And the element is a string.

Data Source :
B.txt--FileReader--BufferedReader
Destination :
Arraylist<string>

2. code example:

1  Packagecn.itcast_02;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.FileReader;5 Importjava.io.IOException;6 Importjava.util.ArrayList;7 8 /*9 * Requirements: Read data from a text file (each behavior is a string of data) into the collection and iterate through the collectionTen  *  One * Analysis: A * Through the meaning of the topic, we can know the following content, - * The data source is a text file.  - * Destination is a collection.  the * and the element is a string.  -  *  - * Data Source: - * B.txt --filereader--BufferedReader + * Destination: - * arraylist<string> +  */ A  Public classFiletoarraylistdemo { at      Public Static voidMain (string[] args)throwsIOException { -         //Encapsulating Data Sources -BufferedReader br =NewBufferedReader (NewFileReader ("B.txt")); -         // Encapsulate Destination (Create collection Object) -arraylist<string> array =NewArraylist<string>(); -  in         //read data stored in the collection -String line =NULL; to          while(line = Br.readline ())! =NULL) { + Array.add (line); -         } the  *         //Freeing Resources $ br.close ();Panax Notoginseng  -         //iterating through the collection the          for(String s:array) { + System.out.println (s); A         } the     } +}

Run the effect as follows:

Java Fundamentals Hardening IO flow notes 45:io Stream exercises the case of storing data in a text file in a collection