public static void main ( String [] args ) {
	int range = 20;
	String [] data = new String [100];
	int max = 0;
	try {
                String encoding="GBK";
                File file=new File("file address");
                if(file.isFile() && file.exists()){ 
                    InputStreamReader read = new InputStreamReader( new FileInputStream(file),encoding);
                    BufferedReader bufferedReader = new BufferedReader(read);
                    String lineTxt = null;
		    int lim = 0;
                    while((lineTxt = bufferedReader.readLine()) != null){
                        data[lim] = lineTxt;
			lim = lim + 1;
                    }
                    read.close();
        }else{
            System.out.println("can not find file");
        }
        } catch (Exception e) {
            System.out.println("file reading failed");
            e.printStackTrace();
        }	
	
	long res = 0;
	
	for ( int i=0; i<100; i++ ) {
	    res = res + Long.parseLong(data[i].substring(0,15));
	}
	System.out.println(res); 
    }