add java code and doc lint to the CI

Author: salah-man

java/pom.xml

@@ -141,7 +141,7 @@
                         <encoding>UTF-8</encoding>
                         <consoleOutput>true</consoleOutput>
                         <failsOnError>false</failsOnError>
-                        <failOnViolation>false</failOnViolation>
+                        <failOnViolation>true</failOnViolation>
                         <violationSeverity>warning</violationSeverity>
                         <format>xml</format>
                         <format>html</format>

java/test.sh

@@ -7,5 +7,10 @@ mvn clean install -pl plasma -am -Dmaven.test.skip
 popd
 pushd $ROOT_DIR/../java
 mvn clean install -Dmaven.test.skip
-mvn test
+check_style=$(mvn checkstyle:check)
+echo "${check_style}"
+[[ ${check_style} =~ "BUILD FAILURE" ]] && exit 1
+mvn_test=$(mvn test)
+echo "${mvn_test}"
+[[ ${mvn_test} =~ "BUILD SUCCESS" ]] || exit 1
 popd

java/test/src/main/java/org/ray/api/test/UniqueIDTest.java renamed to java/test/src/main/java/org/ray/api/test/UIdTest.java

@@ -11,7 +11,8 @@
 import org.ray.core.UniqueIdHelper;
 
 @RunWith(MyRunner.class)
-public class UniqueIdTest {
+public class UIdTest {
+
 
   @RayRemote
   public static String hi(Integer i) {
@@ -23,7 +24,7 @@ public void test() {
     UniqueID tid = UniqueIdHelper.nextTaskId(0xdeadbeefL);
     UniqueIdHelper.setTest(tid, true);
     System.out.println("Tested task id = " + tid);
-    RayFunc_1_1<Integer, String> f = UniqueIdTest::hi;
+    RayFunc_1_1<Integer, String> f = UIdTest::hi;
     RayObject<String> result = new RayObject<>(
         RayRuntime.getInstance().call(
             tid,