Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/18778#discussion_r130412071 --- Diff: core/src/test/java/test/org/apache/spark/JavaSparkContextSuite.java --- @@ -0,0 +1,62 @@ +/* + * 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. + */ + +package test.org.apache.spark; + +import java.io.*; + +import scala.collection.immutable.List; +import scala.collection.immutable.List$; +import scala.collection.immutable.Map; +import scala.collection.immutable.Map$; + +import org.junit.Test; + +import org.apache.spark.api.java.*; +import org.apache.spark.*; + +/** + * Java apps can uses both Java-friendly JavaSparkContext and Scala SparkContext. + */ +public class JavaSparkContextSuite implements Serializable { + + @Test + public void javaSparkContext() { + String[] jars = new String[] {}; + java.util.Map<String, String> environment = new java.util.HashMap<>(); --- End diff -- Thank you for review, @srowen ! This is due to the import conflicts on `Map`. Java code still doesn't allow import aliasing. We can do aliasing only in Scala code.
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