Java tutorial
//package com.java2s; //License from project: Open Source License import java.util.Calendar; public class Main { public static String getTimeString(Calendar calendar) { if (calendar == null) return ""; String hourString = String.format("%1$02d", calendar.get(Calendar.HOUR_OF_DAY)); String minuteString = String.format("%1$02d", calendar.get(Calendar.MINUTE)); StringBuilder dateStringBuilder = new StringBuilder(); dateStringBuilder.append(hourString).append(":"); dateStringBuilder.append(minuteString); return dateStringBuilder.toString(); } }