filerwexam.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

import java.io.*;
import java.util.*;
public class FileRWExam {
  public static void main(String[] args) throws IOException {
    String str = "";
    try {
      System.out.println("请输入要写入文件的内容:");
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      str = br.readLine();
    }
    catch (IOException e) {
      System.out.println(e.toString());
    }
    FileWriter fw = new FileWriter("myText.txt");
    Date d = new Date();
    fw.write(d.toString());
    fw.write('\n');
    fw.write(str);
    char c[]={'\n','E','n','d','!'};
    fw.write(c);
    fw.close();
    System.out.println("保存成功！");
    char cRead[]=new char[500];
    FileReader fr = new FileReader("myText.txt");
    int num=fr.read(cRead);
    String strRead = new String(cRead,0,num);
    System.out.println("从保存的文件中读入的字符总数为:" + num);
    System.out.println(strRead);
  }
}