自写Scanner函数

package io;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Scanner;

public class MyScanner {
    
    private BufferedReader br;
    
    public  MyScanner(InputStream in){
        
        Reader r = new InputStreamReader(in);
        br = new BufferedReader(r);
        
    }
    
    public String nextLine(){
        String str = null;
        try {
            str = br.readLine();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        return str;
    }
    
    public int nextInt(){
        
        return Integer.parseInt(nextLine()) ;
    }
    
    

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub

    /*    Scanner sc = new Scanner(System.in);
        
        int i  = sc.nextInt();
        String str = sc.nextLine();
        */
        MyScanner sc = new MyScanner(System.in);
        //String string = sc.nextLine();
        int i = sc.nextInt(); 
        System.out.println(i);
    }

}