从文件中读取数据、控制输出格式

从一个文件中读取数据：

public static void main(String[] args) throws IOException {// TODO Auto-generated method stubFile m = new File("C:\\Users\\Administrator\\Desktop\\mission.txt");BufferedReader brm = new BufferedReader(new FileReader(m));String s = null;double mission[][] = new double[835][5];int t = 0;while((s=brm.readLine())!=null){String ss [] = s.split("\t");for (int i = 0; i < ss.length; i++) {mission[t][i] = Double.parseDouble(ss[i]);}t++;}}

控制输出的格式：

BigDecimal bd = new BigDecimal(vip[vip.length-1][5]);System.out.println(bd.toPlainString());System.out.println(vip[vip.length-1][5]);DecimalFormat df = new DecimalFormat("0.0000");System.out.println(df.format(10213.0001));System.out.println(df.format(vip[vip.length-1][5]));