myfileio.java

有大量的java的实例

import java.io.*;
public class MyFileIO
{    //将用户键盘输入的字符保存成磁盘文件，并回显在屏幕上
    public static void main(String args[])
    {
      char ch;
      int chi;
      File MyPath = new File("temp1"); 	//也可用绝对目录"c:\\temp"
      if(!MyPath.exists())	//若此目录不存在，则创建之
           MyPath.mkdir();
      File MyFile1 = new File(MyPath,"crt.txt");//创建指定目录下指定文件的文件类对象
      try
      {
	FileOutputStream fout = new FileOutputStream(MyFile1);
	System.out.println("Input a String finished with # please:");
	while((ch=(char)System.in.read())!='#')
	    fout.write(ch);
	fout.close();					 //关闭文件
	System.out.println("");				//换行	   
	FileInputStream fin = new FileInputStream(MyFile1); 
	while((chi=fin.read()) != -1)
	    System.out.print((char)chi);
	fin.close();
      }    //try
      catch(FileNotFoundException e)
      {
        System.err.println(e); 
      }    
      catch(IOException e)	
      {
	System.err.println(e);
      }    
  }    //main()
} 			   //class MyFileIO