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https://issues.apache.org/jira/browse/BEAM-7700?focusedWorklogId=282485&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-282485
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ASF GitHub Bot logged work on BEAM-7700:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 25/Jul/19 06:51
            Start Date: 25/Jul/19 06:51
    Worklog Time Spent: 10m 
      Work Description: robinyqiu commented on pull request #9129: [BEAM-7700] 
Java transform catalog
URL: https://github.com/apache/beam/pull/9129#discussion_r307138151
 
 

 ##########
 File path: website/src/documentation/transforms/java/aggregation/max.md
 ##########
 @@ -0,0 +1,56 @@
+---
+layout: section
+title: "Max"
+permalink: /documentation/transforms/java/aggregation/max/
+section_menu: section-menu/documentation.html
+---
+<!--
+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.
+-->
+# Max
+<table align="left">
+    <a target="_blank" class="button"
+        
href="https://beam.apache.org/releases/javadoc/current/index.html?org/apache/beam/sdk/transforms/Max.html";>
+      <img src="https://beam.apache.org/images/logos/sdks/java.png"; 
width="20px" height="20px"
+           alt="Javadoc" />
+     Javadoc
+    </a>
+</table>
+<br>
+Provides a variety of different transforms for computing the maximum
+values in a collection, either globally or for each key.
+
+## Examples
+**Example 1**: get the maximum of a `PCollection` of `Doubles`.
+
+```java
+ PCollection input = ...;
+ PCollection max = input.apply(Max.doublesGlobally());
+```
+
+**Example 2**: calculate the maximum of the `Integers` associated
+with each unique key (which is of type `String`).
+
+```java
+ PCollection> input = ...;
 
 Review comment:
   Fix typo and add types here. Same for mean.md and sum.md
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 282485)
    Time Spent: 3h 10m  (was: 3h)

> Java transform catalog
> ----------------------
>
>                 Key: BEAM-7700
>                 URL: https://issues.apache.org/jira/browse/BEAM-7700
>             Project: Beam
>          Issue Type: Improvement
>          Components: website
>            Reporter: Rose Nguyen
>            Assignee: Rose Nguyen
>            Priority: Minor
>          Time Spent: 3h 10m
>  Remaining Estimate: 0h
>
> Create catalog of core transforms (Java)
> -Java transforms overview
> -Links to Javadocs
> -Brief description
> -Related transforms
> -Links to programming guide
> -Examples section to integrate Colab notebooks
>  
> See BEAM-7464 for Python.



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