FileInputStream 文件輸入流

package com.io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

public class FileInputStreamDemo {

 /**
  * @Title
  * @Description
  * @param
  * @return void
  * @throws IOException
  * @pages  
  * @throws
  */

 public static void main(String[] args) throws IOException {
  // TODO Auto-generated method stub

  
  int size;
  
  InputStream f = new FileInputStream("D:\\workspace\\bbs\\src\\com\\hygj\\bbs\\bean\\Tip.java");
   
  System.out.println("total available Bytes: "+(size = f.available()));
   
  //第一次讀取n個字節
   
  int n = size/40;
   
  System.out.println("First "+n+" bytes of the file one read() at a time");
   
  for(int i=0;i<n;i++){
    
  System.out.print((char)f.read());
  
  }
  System.out.println("\nStill Available :"+f.available());
  //第二次經過把數據存入緩衝區進行讀取n個字節
  System.out.println("Reading the next "+n+"with one read(b[])");
  byte b[] = new byte[n];
  if(f.read(b)!=n){
   System.out.println("could not read"+n+"bytes");
   
  }
  
  //第三次經過跳過讀取
  System.out.println(new String(b,0,n));
  System.out.println("\nStill available:"+(size=f.available()));
  System.out.println("Skipping half of remaining bytes with skip()");
  f.skip(size/2);
  System.out.println("Still available :"+f.available());
  System.out.println("Reading "+n/2+"into the ehd of array");
  if(f.read(b,n/2,n/2)!=n/2){
   System.out.println("could not read"+n/2+"bytes");
  }
  System.out.println(new String(b,0,b.length));
  System.out.println("\nStill available:"+f.available());
  f.close();
 }

}