Java里的IO流里的FileInputStream 的讀取並在前打印行數！

大家好！！新人求罩！

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


public class work6 {

    /**
     * @param args
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        File file = new File("C:\\Users\\wang\\Desktop\\io作業.txt");//文件的地址！！！
        //System.out.println(file.exists());
        FileInputStream in = new FileInputStream(file);
        
        byte[] b = new byte[1024];
        
        int c = 0;
        
        String str = "";
        
        while((c = in.read(b)) != -1){
             str += new String(b,0,c);//在此拼接
        }
        String[] s = str.split("\n");//以\n來截取！轉化為數組！
        for(int i = 0; i < s.length; i++){//遍歷當前數組！
            System.out.print((i+1)+"\t"+s[i]);
        }
    }

}

一個簡單的讀取就完成了！！就是這么簡單！