Java语言实验报告四

Java 语言与面向对象程序设计基础 课程 实验报告四 姓名 学号 111 实验题 1 实验要求 掌握 Java IO 流处理 掌握文件操作 掌握多线程程序设计 实验程序 import java io public class Test4 1 public static void main String args try File myDir new File C Test if myDir exists myDir mkdir else if myDir isDirectory System err println C Test is not a directory return File f new File myDir a txt f createNewFile FileWriter out new FileWriter f for int i 0 i 26 i out write char A i out close catch IOException e System out println e 运行结果 实验结论与收获 掌握文件及文件夹的创建及文件的写入 实验题 2 实验要求 将实验 1 题中新建的 a txt 文件内容复制到 C Test Ex 目录中 b txt 文件中 实验程序 import java io public class Test4 2 public static void main String args try File myDir new File C Test Ex if myDir exists myDir mkdir else if myDir isDirectory System err println myDir is not a directory return File myFile new File myDir b txt myFile createNewFile FileReader in new FileReader C Test a txt BufferedReader bufIn new BufferedReader in FileWriter out new FileWriter myFile BufferedWriter bufOut new BufferedWriter out String line line bufIn readLine System out println line while line null System out println line bufOut write line 0 line length bufOut newLine line bufIn readLine bufIn close bufOut close catch IOException e System out println e 运行结果 实验结论与收获 掌握文件读取和写入 实验题 3 实验要求 将实验 1 题中新建的 a txt 文件中写入字符 替换第 6 个字符 实验程序 import java io public class Test4 3 public static void main String args try RandomAccessFile r new RandomAccessFile C Test a txt rw r seek 5 r write r close catch IOException e System out println e 运行结果 实验结论与收获 掌握随机文件创建与写入 实验题 4 实验要求 调试并记录多线程程序 生产者 消费者实例 结果 体会多线程机制 实验程序 Consumer java class Consumer implements Runnable SStack theStack public Consumer SStack s theStack s public void run char c for int i 0 i 20 i c theStack pop System out println Consumed c try Thread sleep int Math random 1000 catch InterruptedException e Producer java class Producer implements Runnable SStack theStack public Producer SStack s theStack s public void run char c for int i 0 i 20 i c char Math random 26 A theStack push c System out println Produced c try Thread sleep int Math random 100 catch InterruptedException e SStack java class SStack private int index 0 private char data new char 10 public synchronized void push char c while index data length try this wait catch InterruptedException e this notify data index c index public synchronized char pop while index 0 try this wait catch InterruptedException e this notify index return data index STest java public class STest public static void main String args SStack stack new SStack Runnable p