- 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();
- }
- }
来源: http://www.bubuko.com/infodetail-2975261.html