第八章

1>选择题
(1)a(2)a(3)b(4)c(5)d
2>

package jbit.io.homework;

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

public class ReaderAndWriterFile {
	public static void main(String[] args) {
		 BufferedReader reader=null;
		 BufferedWriter writer=null;
		 try {
			//创建 FileReader对象和FileWriter对象.
			FileReader fr  = new FileReader("c:\\source.txt");  
			FileWriter fw = new FileWriter("d:\\target.txt");
           //创建 输入、输入出流对象.
           reader = new BufferedReader(fr);
           writer = new BufferedWriter(fw);
           String line = null;
           StringBuffer sbf=new StringBuffer();  
           //循环读取并追加字符
           while ((line = reader.readLine()) != null) {
               sbf.append(line);  
           }
           writer.write(sbf.toString());  //写入文件  
       } catch (FileNotFoundException e) {
    	   System.out.println("无此文件");
       }catch (IOException e) {
           e.printStackTrace();
       }finally{
    	   //关闭 reader 和 writer.
           try {
        	   if(reader!=null)
        		   reader.close();
        	   if(writer!=null)
        		   writer.close();  
           }catch (IOException e) {
				e.printStackTrace();
		   } 		
       }
	}
}

package jbit.io.homework;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Writer;

public class ReadIinFile {
	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);
	        
	      }
	    }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();
			}
	    }
	}
}