ICU-22324 Update BRS task docs

docs/processes/release/tasks/healthy-code.md

@@ -541,8 +541,8 @@ demo.
 
 ```sh
 $ cd icu4j
-$ ant jarDemos
-$ java -jar icu4jdemos.jar
+$ mvn install -am -pl demos -DskipTests -DskipITs
+$ mvn exec:exec -pl demos
 ```
 
 Above command invokes GUI demo applications. As such it has to connect to a
@@ -561,16 +561,12 @@ ICU4J samples are located in directory <icu4j_root>/samples. Check that:
     
 To check ICU4J samples, you may use the command line to build and then run each:
 ```sh
-    $ cd icu4j/samples
-    $ ant build
-    
-    # Get the list of main samples to test.
-    $ grep -r main src/
-      src/com/ibm/icu/samples/text/dateintervalformat/DateIntervalFormatSample.java
-      ...
-    
-    # For each sample, execute as follows:
-    $ java -cp ../icu4j.jar:out/lib/icu4j-samples.jar com.ibm.icu.samples.text.dateintervalformat.DateIntervalFormatSample
+$ cd icu4j
+$ mvn install -am -pl samples -DskipTests -DskipITs
+
+# Get the list of samples with `main` methods, and execute to test.
+$ classes=`grep -r "void main" samples/src/ -l | ruby -lane 'file=$_; m = file.match(/src\/main\/java\/(.*)\.java$/); puts m[1];' | tr '/' '.'`
+$ for class in $classes; do echo $class; mvn exec:java -pl samples -Dexec.mainClass="$class"; echo "Press enter to continue"; read; done
 ```
     
 To use Eclipse, do the following:
@@ -590,7 +586,7 @@ To use Eclipse, do the following:
 For ICU4J,
 
 ```sh
-$ ant exhaustiveCheck
+$ mvn verify -DICU.exhaustive=10
 ```
 
 For ICU4C, testing with an optimized build will help reduce the elapsed time

icu4j/demos/pom.xml

@@ -44,6 +44,27 @@
           <skip>true</skip>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>exec</goal>
+            </goals>
+          </execution>
+        </executions>
+        <configuration>
+          <executable>java</executable>
+          <arguments>
+            <argument>-classpath</argument>
+            <!-- automatically creates the classpath using all project dependencies,
+                 also adding the project build directory -->
+            <classpath/>
+            <argument>com.ibm.icu.dev.demo.Launcher</argument>
+          </arguments>          
+        </configuration>
+      </plugin>
     </plugins>
   </build>
 

icu4j/pom.xml

@@ -418,6 +418,11 @@
             </archive>
           </configuration>
         </plugin>
+        <plugin>
+          <groupId>org.codehaus.mojo</groupId>
+          <artifactId>exec-maven-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
       </plugins>
     </pluginManagement>
 

icu4j/samples/pom.xml

@@ -39,6 +39,10 @@
           <skip>true</skip>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.codehaus.mojo</groupId>
+        <artifactId>exec-maven-plugin</artifactId>
+      </plugin>
     </plugins>
   </build>