Java Basics Enhanced IO flow notes 47:io stream exercise random get name case in text file

1. Randomly get name cases in a text file

Requirements: I have a text file stored in a few names, please write a program implementation randomly get a person's name.

Analysis:
A: Storing the data in a text file in a collection
B: Randomly produce an index
C: Gets a value based on the index

2. Code implementation:

1  Packagecn.itcast_02;2 3 ImportJava.io.BufferedReader;4 ImportJava.io.FileReader;5 Importjava.io.IOException;6 Importjava.util.ArrayList;7 ImportJava.util.Random;8 9 /*Ten * Requirements: I have a text file stored in a few names, please write a program implementation randomly get a person's name.  One  *  A * Analysis: - * A: Storing the data in a text file in a collection - * B: Randomly generate an index the * C: Gets a value based on the index -  */ -  Public classGetName { -      Public Static voidMain (string[] args)throwsIOException { +         //storing data in a text file in a collection -BufferedReader br =NewBufferedReader (NewFileReader ("B.txt")); +arraylist<string> array =NewArraylist<string>(); AString line =NULL; at          while(line = Br.readline ())! =NULL) { - Array.add (line); -         } - br.close (); -  -         //randomly produce an index inRandom r =NewRandom (); -         intindex =R.nextint (Array.size ());// 0 <= index <= array.size ()-1  to  +         //gets a value based on the index -String name =Array.get (index); theSystem.out.println ("The Lucky person is:" +name); *     } $}

The operating effect is:

Java Basics Enhanced IO flow notes 47:io stream exercise random get name case in text file