使用java面向对象第八章

1.简述java流的分类
字节流：输入流InputStream和输出流OutputStream
字符流：输入流Reader 和输出流Writer
2.异常：
FileNotFoundException（文件找不到）和IOException
3.

package com.bdqn7;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class zuoye1 {

	public static void main(String[] args) {
		BufferedReader br=null;
		BufferedWriter wr=null;
	FileReader fr;
	FileWriter fw;
	try {
		fr = new FileReader("c:\\source.txt");
		fw = new FileWriter("d:\\targer.txt");
		br=new BufferedReader(fr);
		wr=new BufferedWriter(fw);
		String line=null;
		StringBuffer sbf=new StringBuffer();
		//循环追加
		while((line=br.readLine())!=null){
			sbf.append(line);
			
		}
		wr.write(sbf.toString());//写入文件
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}finally{
		if(br!=null){
			try {
				br.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			if(wr!=null){
				try {
					wr.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
	}
	
	
		
	}
}

package com.bdqn7;

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

public class zuoye2 {

	public static void main(String[] args) {
		  FileInputStream fis = null;
	      DataInputStream dis = null;
		  try {
			  //创建输出流对象
		      fis = new FileInputStream("C:\\Windows\\win.ini");
		      dis = new  DataInputStream(fis);
		      //创建输入流对象
		   /*   int temp;
		      //读取文件并写入文件
		      while ( (temp = dis.read()) != -1) {
		        System.out.print((char)temp);
		        
		      }*/
		      byte words[]=new byte[1024];
		      int len;
		      if((len=dis.read(words))!=-1){
		    	  System.out.println(new String(words,0,len));
		      }
		      
		    }catch (FileNotFoundException e) {
		    	System.out.println("无此文件");
		    }catch (IOException ioe) {
		      ioe.printStackTrace();
		    }finally{
		    	try {
		    		if(fis!=null)
		    			fis.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		    }
	}
}