java例程练习（字符流)

import java.io.*; public class TestFileReader { public static void main(String[] args) { FileReader fr = null; int c = 0; try { fr = new FileReader("C:/java/Test.java"); while((c = fr.read()) != -1) { System.out.print((char)c); } fr.close(); } catch (FileNotFoundException e) { System.out.println("找不到指定文件"); } catch (IOException e) { System.out.println("文件读取错误"); } } } import java.io.*; public class TestFileWriter { public static void main(String[] args) { FileWriter fw = null; try { fw = new FileWriter("C:/java/unicode.txt"); for(int c = 0; c <= 50000; c++) { fw.write(c); } fw.close(); } catch (IOException e) { System.out.println(e.getMessage()); System.out.println("文件写入错误"); System.exit(-1); } } }