#677 init folder for pattern trampoline

trampoline/.gitignore

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+/target/
+.idea/

trampoline/README.md

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+---
+layout: pattern
+title: Trampoline
+folder: trampoline
+permalink: /patterns/trampoline/
+categories: Behavior
+tags:
+ - Java
+ - Difficulty-Intermediate
+ - Performance
+ - Recursion
+---
+
+## Intent
+By representing a computation in one of 2 states 
+(completed with result, or a reference to the reminder of the computation, 
+something like the way a java.util.Supplier does) 
+it is possible to implement algorithms recursively in Java without blowing the stack 
+and to interleave the execution of functions without hard coding them together or even using threads.
+
+
+
+## Applicability
+Use the Trampoline pattern when
+
+* For implementing tail recursive function. This pattern allows to switch on a stackless operation.
+* For to interleaving the execution of two or more functions on the same thread.
+
+## Known uses(real world examples)
+* Trampoline refers to using reflection to avoid using inner classes, for example in event listeners. 
+The time overhead of a reflection call is traded for the space overhead of an inner class. 
+Trampolines in Java usually involve the creation of a GenericListener to pass events to an outer class.
+
+## Credits
+
+* [Trampolining: a practical guide for awesome Java Developers](https://medium.com/@johnmcclean/trampolining-a-practical-guide-for-awesome-java-developers-4b657d9c3076)
+* [Trampoline in java ](http://mindprod.com/jgloss/trampoline.html)
+

trampoline/pom.xml

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+<?xml version="1.0"?>
+<!--
+
+    The MIT License
+    Copyright (c) 2014-2016 Ilkka Seppälä
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+
+-->
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+         xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.iluwatar</groupId>
+        <artifactId>java-design-patterns</artifactId>
+        <version>1.19.0-SNAPSHOT</version>
+    </parent>
+    <artifactId>trampoline</artifactId>
+    <dependencies>
+        <!-- https://mvnrepository.com/artifact/junit/junit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.16.18</version>
+            <scope>provided</scope>
+        </dependency>
+
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.19</version>
+                <configuration>
+                    <skipTests>false</skipTests>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

trampoline/src/main/java/com/iluwatar/trampoline/App.java

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+package com.iluwatar.trampoline;
+
+public class App {
+}