Here you can find the source of areEqualStr(Object o1, Object o2)
public static boolean areEqualStr(Object o1, Object o2)
//package com.java2s; /**/*from ww w . j a v a2 s . c om*/ * The contents of this file are subject to the OpenMRS Public License * Version 1.0 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://license.openmrs.org * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the * License for the specific language governing rights and limitations * under the License. * * Copyright (C) OpenMRS, LLC. All Rights Reserved. */ import java.util.Arrays; import java.util.Collection; public class Main { public static boolean areEqualStr(Object o1, Object o2) { if (o1 == o2) { return true; } return nvlStr(o1, "").equals(nvlStr(o2, "")); } public static String nvlStr(Object o, String valueIfNull) { if (isEmpty(o)) { return valueIfNull; } return o.toString(); } public static boolean isEmpty(Object o) { return o == null || o.equals(""); } public static String toString(Collection<?> c) { StringBuilder ret = new StringBuilder(); if (c != null) { for (Object o : c) { ret.append(ret.length() == 0 ? "" : ",").append(o); } } return ret.toString(); } public static String toString(Object[] c) { if (c != null) { return toString(Arrays.asList(c)); } return ""; } }