摘要：// "%04d" 取4位数 String.format("%04d", 19) 阅读全文

摘要：java格式化时间到毫秒：SimpleDateFormat formatter = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss:SSS");String formatStr =formatter.format(new Date(); 参数说明： Symbol 阅读全文

摘要：// 延时3秒执行任务 ScheduledExecutorService scheduledThreadPool = Executors.newScheduledThreadPool(5);scheduledThreadPool.schedule(new Runnable() { public vo 阅读全文

摘要：Date date = new Date();SimpleDateFormat dateFm = new SimpleDateFormat("EEEE");String currSun = dateFm.format(date); // "星期二".equals(currSun) || "Tuesd 阅读全文

摘要：Calendar calendar = Calendar.getInstance(); int hour = calendar.get(Calendar.HOUR_OF_DAY); // 24小时制 Calendar calendar = Calendar.getInstance();int hou 阅读全文