Here you can find the source of floorAsDate(Timestamp time)
public static Timestamp floorAsDate(Timestamp time)
//package com.java2s; /**/* www. j a v a2 s.c om*/ * ===================================================================== * * Copyright 2011 NTT Sofware Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * ===================================================================== */ import java.sql.Timestamp; import java.util.Calendar; public class Main { public static Timestamp floorAsDate(Timestamp time) { Calendar cal = Calendar.getInstance(); cal.setTime(time); cal.set(Calendar.HOUR_OF_DAY, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MILLISECOND, 0); return new Timestamp(cal.getTimeInMillis()); } }