Here you can find the source of buildInvalidArgsError(Stream
public static String buildInvalidArgsError(Stream<Object> values, Stream<Class> types)
//package com.java2s; /*//from w w w. j a va 2s . c o m * Copyright (C) 2017 Julien Viet * * 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.stream.Collectors; import java.util.stream.Stream; public class Main { public static String buildInvalidArgsError(Stream<Object> values, Stream<Class> types) { return "Values [" + values.map(String::valueOf).collect(Collectors.joining(", ")) + "] cannot be coerced to [" + types.map(Class::getSimpleName).collect(Collectors.joining(", ")) + "]"; } }