Merge remote-tracking branch 'origin/main' into main

.gitignore

@@ -2,7 +2,7 @@
 out/
 !**/src/main/**/out/
 !**/src/test/**/out/
-
+target/
 ### Eclipse ###
 .apt_generated
 .classpath
@@ -27,4 +27,5 @@ bin/
 
 ### Mac OS ###
 .DS_Store
-/.idea/
+.idea/
+*.iml

.idea/.gitignore

@@ -1,3 +0,0 @@
-# Default ignored files
-/shelf/
-/workspace.xml

.idea/compiler.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="CompilerConfiguration">
-    <annotationProcessing>
-      <profile name="Maven default annotation processors profile" enabled="true">
-        <sourceOutputDir name="target/generated-sources/annotations" />
-        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
-        <outputRelativeToContentRoot value="true" />
-        <module name="java_test" />
-      </profile>
-    </annotationProcessing>
-    <bytecodeTargetLevel target="21" />
-  </component>
-</project>

.idea/inspectionProfiles/Project_Default.xml

@@ -1,8 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <profile version="1.0">
-    <option name="myName" value="Project Default" />
-    <inspection_tool class="AutoCloseableResource" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="METHOD_MATCHER_CONFIG" value="java.util.Formatter,format,java.io.Writer,append,com.google.common.base.Preconditions,checkNotNull,org.hibernate.Session,close,java.io.PrintWriter,printf,java.io.PrintStream,printf,java.lang.foreign.Arena,ofAuto,java.lang.foreign.Arena,global,java.util.concurrent.Executors,newFixedThreadPool" />
-    </inspection_tool>
-  </profile>
-</component>

.idea/jarRepositories.xml

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RemoteRepositoriesConfiguration">
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Maven Central repository" />
-      <option name="url" value="https://repo1.maven.org/maven2" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="jboss.community" />
-      <option name="name" value="JBoss Community repository" />
-      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
-    </remote-repository>
-    <remote-repository>
-      <option name="id" value="central" />
-      <option name="name" value="Central Repository" />
-      <option name="url" value="https://maven.aliyun.com/repository/central" />
-    </remote-repository>
-  </component>
-</project>

.idea/misc.xml

@@ -1,14 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ExternalStorageConfigurationManager" enabled="true" />
-  <component name="MavenProjectsManager">
-    <option name="originalFiles">
-      <list>
-        <option value="$PROJECT_DIR$/pom.xml" />
-      </list>
-    </option>
-  </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/out" />
-  </component>
-</project>

.idea/modules.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/java_test.iml" filepath="$PROJECT_DIR$/java_test.iml" />
-    </modules>
-  </component>
-</project>

.idea/vcs.xml

@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="VcsDirectoryMappings">
-    <mapping directory="$PROJECT_DIR$" vcs="Git" />
-  </component>
-</project>

java_test.iml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="AdditionalModuleElements">
-    <content url="file://$MODULE_DIR$" dumb="true">
-      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
-    </content>
-  </component>
-</module>

src/main/java/jvm/TryCatchDemo.java

@@ -0,0 +1,27 @@
+package main.java.jvm;
+
+/**
+ * in test method, x will assign to return value, here should be 1 (it will not throw any errors)
+ * then, the finally block will change x to 3, but the return value will not change
+ * How finally work is attach the code block in it to try block and catch block
+ */
+public class TryCatchDemo {
+
+    public int test() {
+        int x=0;
+        try {
+            x=1;
+            return x;
+        } catch (Exception e) {
+            x=2;
+            return x;
+        } finally {
+            x=3;
+        }
+    }
+
+    public static void main(String[] args) {
+        TryCatchDemo tryCatchDemo = new TryCatchDemo();
+        System.out.println(tryCatchDemo.test());
+    }
+}

target/maven-archiver/pom.properties

@@ -0,0 +1,3 @@
+artifactId=java-learning
+groupId=com.kuaslab
+version=1.0-SNAPSHOT

target/maven-status/maven-compiler-plugin/compile/compile/createdFiles.lst

@@ -0,0 +1,54 @@
+jvm/createthread/CreateByExecutorService.class
+threaddemo/WeakReferenceExample.class
+feature/ReduceTest.class
+jvm/createthread/CreateByThreadGroup.class
+jvm/ConstantPoolDemo.class
+jvm/debugtool/JHSDBTestCase$Test.class
+threaddemo/DeadLockFixDemo.class
+threaddemo/lock/CLH.class
+threaddemo/MultiThreadDemo.class
+jvm/debugtool/DeadLockDemo$SyncAddRunnable.class
+threaddemo/ProcessDemo.class
+threaddemo/VolatileAtomicDemo.class
+jvm/createthread/CreateByTimer$1.class
+jvm/createthread/CreateByAnonymousClass.class
+threaddemo/ThreadStateWithWait.class
+jvm/gc/PrintMemoryAddress.class
+jvm/classfile/TestClass.class
+jvm/createthread/CreateByForkJoin.class
+jvm/ShowObjectHeader.class
+threaddemo/ThreadStateWithJoin.class
+threaddemo/SafeVolatileDemo.class
+threaddemo/ThreadShareVariable.class
+threaddemo/ThreadStateWithSync.class
+jvm/oom/HeapOOM.class
+threaddemo/ThreadStateWithLockSupport.class
+jvm/oom/JavaVMStackSOF.class
+threaddemo/DeadlockDemo.class
+jvm/oom/HeapOOM$OOMObject.class
+threaddemo/InterruptTest.class
+io/ReadAndUpload$1.class
+main/java/recursive/TreeStructure.class
+jvm/gc/MemoryAllocationYoung.class
+jvm/createthread/CreateByTimer.class
+jvm/createthread/CreateByThread.class
+io/FileChunkInitReq.class
+threaddemo/lock/CLHDemo.class
+main/java/recursive/TreeNode.class
+jvm/gc/TenuringThreshold.class
+threaddemo/dataracing/CASByAtomicInteger.class
+jvm/gc/ReferenceCountingGC.class
+jvm/createthread/CreateByRunnable.class
+jvm/createthread/CreateByCompletableFuture.class
+io/ReadAndUpload.class
+jvm/debugtool/JHSDBTestCase.class
+jvm/debugtool/DeadLockDemo.class
+threaddemo/lock/CLH$Node.class
+jvm/debugtool/JHSDBTestCase$ObjectHolder.class
+jvm/VarHandleDemo.class
+main/java/jvm/ObjectCreate.class
+jvm/createthread/CreateByFutureTask.class
+threaddemo/ThreadLocalDemo.class
+jvm/createthread/CreateByAnonymousClass$1.class
+threaddemo/dataracing/SyncDemo.class
+jvm/createthread/CreateByCallable.class

target/maven-status/maven-compiler-plugin/compile/compile/inputFiles.lst

@@ -0,0 +1,46 @@
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByTimer.java
+/home/admin/projects/java_test/src/main/java/jvm/ConstantPoolDemo.java
+/home/admin/projects/java_test/src/main/java/threaddemo/WeakReferenceExample.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByAnonymousClass.java
+/home/admin/projects/java_test/src/main/java/recursive/TreeNode.java
+/home/admin/projects/java_test/src/main/java/jvm/ObjectCreate.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadShareVariable.java
+/home/admin/projects/java_test/src/main/java/threaddemo/dataracing/SyncDemo.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadStateWithWait.java
+/home/admin/projects/java_test/src/main/java/jvm/gc/TenuringThreshold.java
+/home/admin/projects/java_test/src/main/java/threaddemo/SafeVolatileDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByForkJoin.java
+/home/admin/projects/java_test/src/main/java/jvm/gc/PrintMemoryAddress.java
+/home/admin/projects/java_test/src/main/java/threaddemo/InterruptTest.java
+/home/admin/projects/java_test/src/main/java/threaddemo/lock/CLH.java
+/home/admin/projects/java_test/src/main/java/threaddemo/DeadLockFixDemo.java
+/home/admin/projects/java_test/src/main/java/threaddemo/MultiThreadDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByCompletableFuture.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByRunnable.java
+/home/admin/projects/java_test/src/main/java/jvm/debugtool/JHSDBTestCase.java
+/home/admin/projects/java_test/src/main/java/jvm/debugtool/DeadLockDemo.java
+/home/admin/projects/java_test/src/main/java/io/ReadAndUpload.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ProcessDemo.java
+/home/admin/projects/java_test/src/main/java/threaddemo/dataracing/CASByAtomicInteger.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadStateWithSync.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByExecutorService.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadLocalDemo.java
+/home/admin/projects/java_test/src/main/java/feature/ReduceTest.java
+/home/admin/projects/java_test/src/main/java/io/FileChunkInitReq.java
+/home/admin/projects/java_test/src/main/java/threaddemo/VolatileAtomicDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByFutureTask.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadStateWithLockSupport.java
+/home/admin/projects/java_test/src/main/java/threaddemo/lock/CLHDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/oom/HeapOOM.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByThreadGroup.java
+/home/admin/projects/java_test/src/main/java/threaddemo/ThreadStateWithJoin.java
+/home/admin/projects/java_test/src/main/java/jvm/gc/ReferenceCountingGC.java
+/home/admin/projects/java_test/src/main/java/recursive/TreeStructure.java
+/home/admin/projects/java_test/src/main/java/jvm/VarHandleDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByThread.java
+/home/admin/projects/java_test/src/main/java/jvm/oom/JavaVMStackSOF.java
+/home/admin/projects/java_test/src/main/java/jvm/createthread/CreateByCallable.java
+/home/admin/projects/java_test/src/main/java/jvm/gc/MemoryAllocationYoung.java
+/home/admin/projects/java_test/src/main/java/threaddemo/DeadlockDemo.java
+/home/admin/projects/java_test/src/main/java/jvm/classfile/TestClass.java
+/home/admin/projects/java_test/src/main/java/jvm/ShowObjectHeader.java