Here you can find the source of toString(Object val)
private static String toString(Object val)
//package com.java2s; /*/* www . ja v a 2s. com*/ * Copyright 2011 Bert van Brakel * * 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.util.Arrays; import java.util.Collection; public class Main { private static String toString(Object val) { if (val == null) { return null; } if (val.getClass().isArray()) { return Arrays.deepToString((Object[]) val); } if (Collection.class.isAssignableFrom(val.getClass())) { return val.toString(); } return val.toString(); } }