/** * @author：羅大錘 * @date: 2017年9月6日 下午2:35:43 * @version 1.0 * @method:讀取文本具體某行內容 * @parameter * @since * @return */public class OpenTextLine {	public static void main(String[] args) throws IOException {		long timeStart = System.currentTimeMillis();		File file = new File("testData.txt");//文件路徑		FileReader fileReader = new FileReader(file);		LineNumberReader reader = new LineNumberReader(fileReader);		int number = 9999999;//設置指定行數		String txt = "";		int lines = 0;		while (txt != null) {			lines++;			txt = reader.readLine();			if (lines == number) {				System.out.println("第" + reader.getLineNumber() + "的內容是：" + txt + "/n");				long timeEnd = System.currentTimeMillis();				System.out.println("總共花費：" + (timeEnd - timeStart) + "ms");				System.exit(0);			}		}		reader.close();		fileReader.close();	}}