public

static

void

main(String[] args)

throws

IOException {

        

long

timeStart = System.currentTimeMillis();

        

File file =

new

File(

"testData.txt"

);

//文件路径

        

FileReader fileReader =

new

FileReader(file);

        

LineNumberReader reader =

new

LineNumberReader(fileReader);

        

int

number =

99

;

//设置指定行数

        

String txt =

""

;

        

int

lines =

0

;

        

while

(txt !=

null

) {

            

lines++;

            

txt = reader.readLine();

            

if

(lines == number) {

                

System.out.println(

"第"

+ reader.getLineNumber() +

"的内容是："

+ txt +

"\n"

);

                

long

timeEnd = System.currentTimeMillis();

                

System.out.println(

"总共花费："

+ (timeEnd - timeStart) +

"ms"

);

                

System.exit(

0

);

            

}

        

}

        

reader.close();

        

fileReader.close();

    

}

}