Here you can find the source of className(Object obj)
static public String className(Object obj)
//package com.java2s; /*//from ww w.j ava 2 s .c om * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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. */ public class Main { static public String className(Object obj) { return classShortName(obj.getClass()); } static public String classShortName(Class<?> cls) { String tmp = cls.getName(); int i = tmp.lastIndexOf('.'); tmp = tmp.substring(i + 1); return tmp; } }