/* * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ import java.util.Arrays; import java.util.List; import java.util.function.Predicate; public class PredicateApp { public static void main(String[] args){ boolean isRuntime = (args.length == 1 && args[0].equals("run")) ? true : false; List languages = Arrays.asList("Java", "Scala", "C++", "Haskell", "Lisp"); doit(() -> { System.out.println("Languages which starts with J :"); filter(languages, (str)->((String)str).startsWith("J")); LambdaVerification.verifyCallerIsArchivedLambda(isRuntime); }); doit(() -> { System.out.println("Languages which ends with a "); filter(languages, (str)->((String)str).endsWith("a")); LambdaVerification.verifyCallerIsArchivedLambda(isRuntime); }); doit(() -> { System.out.println("Print all languages :"); filter(languages, (str)->true); LambdaVerification.verifyCallerIsArchivedLambda(isRuntime); }); doit(() -> { System.out.println("Print no language : "); filter(languages, (str)->false); LambdaVerification.verifyCallerIsArchivedLambda(isRuntime); }); doit(() -> { System.out.println("Print language whose length greater than 4:"); filter(languages, (str)->((String)str).length() > 4); LambdaVerification.verifyCallerIsArchivedLambda(isRuntime); }); } public static void filter(List names, Predicate condition) { names.stream().filter((name) -> (condition.test(name))).forEach((name) -> { System.out.println(name + " "); }); } static void doit(Runnable t) { t.run(); } }