IO 练习

package Aug14.IO;

import java.io.*;

public class TestIO2 {

    public static void main(String[] args) {
        File file = new File("D://Text.txt");
        File f1=new File("D://Test1.txt");
        File f2=new File("D://Test2.txt");
        FileReader fr = null;
        int count = 0;
        try {
            fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            
            FileWriter fw1 = new FileWriter(f1);
            BufferedWriter bw1 = new BufferedWriter(fw1);
            
            FileWriter fw2 = new FileWriter(f2);
            BufferedWriter bw2 = new BufferedWriter(fw2);
            
            String s = null;
            while ((s = br.readLine()) != null) {

                if (count % 2 != 0) {
                    bw1.write(s);
                    bw1.newLine();
                    //System.out.println(s);

                } else {
                    bw2.write(s);
                    bw2.newLine();
                    //System.out.println(s);
                }

                count++;
            }
            
            bw1.close();
            bw2.close();
            br.close();
            fr.close();
            fw1.close();
            fw2.close();

        } catch (FileNotFoundException e) {

            e.printStackTrace();
        } catch (IOException e) {

            e.printStackTrace();
        }

    }

}

package Aug14.IO;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class TestIO3 {

    public static void main(String[] args) {
        File file = new File("D://Text1.txt");
        FileReader fr = null;
        String s = null;
        int count = 0;
        int length=0;
        try {
            fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            while ((s = br.readLine()) != null) {
                int n = s.split(" ").length;
                count =count+n;
                length+=s.length()-n;
            }
            System.out.println("the number of words : " + count);
            System.out.println("the length of all word: " + length);
            System.out.printf("the average word length: %.2f " ,(double) length/count);
        } catch (Exception e) {

            e.printStackTrace();
        }

    }

}

package Aug14.IO;


import java.io.*;

public class Test1 {

    public static void main(String[] args) {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        File file=new File("D://Test12.txt");
        
        try {
            System.out.print("Enter a File with Path: ");
            String  filename=br.readLine();
            
            File file1=new File(filename);
            if(file1.exists()&&file1.isFile()){
                System.out.print("Enter a word to searth: ");
                String  word=br.readLine();
                InputStream in=new FileInputStream(file1);
                byte data[]=new byte [1024];
                int len=in.read(data);
                String s=new String (data,0,len);
                if(s.indexOf(word)!=-1)
                {
                    int n=s.split(word).length-1; //Word 出现个数
                    
                    System.out.println("The word is exits! count= "+n);
                    System.out.println(s);
                
                }
                else
                    System.out.println("The word is not exits!");
            }
            else
                System.out.println("The file  is not exits!");
            
        } catch (IOException e) {


        }
    }

}