diff --git a/core-java-modules/core-java-annotations/README.md b/core-java-modules/core-java-annotations/README.md
index 22f79c2473..e8a8d19f04 100644
--- a/core-java-modules/core-java-annotations/README.md
+++ b/core-java-modules/core-java-annotations/README.md
@@ -1,6 +1,7 @@
-=========
+## Annotation（注解）
+Java 注解（Annotation）又称 Java 标注，是 JDK5.0 引入的一种注释机制。
 
-## Core Java Cookbooks and Examples
+Java 语言中的类、方法、变量、参数和包等都可以被标注。和 Javadoc 不同，Java 标注可以通过反射获取标注内容。在编译器生成类文件时，标注可以被嵌入到字节码中。Java 虚拟机可以保留标注内容，在运行时可以获取到标注内容 。 当然它也支持自定义 Java 标注。
 
 ### 相关的文章： 
 - [Java @Override Annotation](https://www.baeldung.com/java-override)
diff --git a/core-java-modules/core-java-numbers/src/test/java/com/ossez/number/foramt/NumberFormatExceptionTest.java b/core-java-modules/core-java-numbers/src/test/java/com/ossez/number/foramt/NumberFormatExceptionTest.java
index 76de601f22..d8b055c2db 100644
--- a/core-java-modules/core-java-numbers/src/test/java/com/ossez/number/foramt/NumberFormatExceptionTest.java
+++ b/core-java-modules/core-java-numbers/src/test/java/com/ossez/number/foramt/NumberFormatExceptionTest.java
@@ -43,7 +43,7 @@ public class NumberFormatExceptionTest {
 
 
 //		Integer aIntegerObj = new Integer("one");
-//        Double doubleDecimalObj = new Double("two.2");
+//      Double doubleDecimalObj = new Double("two.2");
     }
 
 
diff --git a/core-java-modules/core-java-strings/README.md b/core-java-modules/core-java-strings/README.md
index 53d6ca5b97..feacaf2ed5 100644
--- a/core-java-modules/core-java-strings/README.md
+++ b/core-java-modules/core-java-strings/README.md
@@ -3,14 +3,15 @@
 本模块中包含有关 Java 字符串（String）有关的文章。
 
 ### 相关文章
-- [Java 使用 char[] Array 还是 String 存储字符串](https://www.ossez.com/t/java-char-array-string/14015)
-- [Compact Strings in Java 9](https://www.baeldung.com/java-9-compact-string)
+- [Java 使用 char[] Array 还是 String 存储字符串密码](https://www.ossez.com/t/java-char-array-string/14015)
+- [Java 9 中的字符串（String）压缩](https://www.ossez.com/t/java-9-string/14024)
 - [String Not Empty Test Assertions in Java](https://www.baeldung.com/java-assert-string-not-empty)
 - [String Performance Hints](https://www.baeldung.com/java-string-performance)
 - [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)
 - [Java – Generate Random String](https://www.baeldung.com/java-random-string)
 - [Java String Interview Questions and Answers](https://www.baeldung.com/java-string-interview-questions)
 - [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
-- [Guide to Java String Pool](https://www.baeldung.com/java-string-pool)
+- [Java 中的 String Pool 简介](https://www.ossez.com/t/java-string-pool/14017)
 - [Fixing “constant string too long” Build Error](https://www.baeldung.com/java-constant-string-too-long-error)
 - [Java 对象如何安全的 toString](https://www.ossez.com/t/java-tostring/14000)
+- [编程常用的几种字符编码](https://www.ossez.com/t/topic/14022)
diff --git a/core-java-modules/core-java-strings/src/main/java/com/ossez/java9/compactstring/CompactStringDemo.java b/core-java-modules/core-java-strings/src/main/java/com/ossez/java9/compactstring/CompactStringDemo.java
index a0acd81a28..616239ebea 100644
--- a/core-java-modules/core-java-strings/src/main/java/com/ossez/java9/compactstring/CompactStringDemo.java
+++ b/core-java-modules/core-java-strings/src/main/java/com/ossez/java9/compactstring/CompactStringDemo.java
@@ -5,21 +5,22 @@ import java.util.stream.IntStream;
 
 import static java.util.stream.Collectors.toList;
 
+/**
+ * Java 9 String Compact testing
+ * <p>
+ * <p><a href="https://www.ossez.com/t/java-9-string/14024">https://www.ossez.com/t/java-9-string/14024</a></p>
+ */
 public class CompactStringDemo {
 
     public static void main(String[] args) {
         long startTime = System.currentTimeMillis();
-        List strings = IntStream.rangeClosed(1, 10_000_000)
-          .mapToObj(Integer::toString).collect(toList());
+        List strings = IntStream.rangeClosed(1, 10_000_000).mapToObj(Integer::toString).collect(toList());
         long totalTime = System.currentTimeMillis() - startTime;
-        System.out.println("Generated " + strings.size() + " strings in "
-          + totalTime + " ms.");
+        System.out.println("Generated " + strings.size() + " strings in " + totalTime + " ms.");
 
         startTime = System.currentTimeMillis();
-        String appended = (String) strings.stream().limit(100_000)
-          .reduce("", (left, right) -> left.toString() + right.toString());
+        String appended = (String) strings.stream().limit(100_000).reduce("", (left, right) -> left.toString() + right.toString());
         totalTime = System.currentTimeMillis() - startTime;
-        System.out.println("Created string of length " + appended.length()
-          + " in " + totalTime + " ms.");
+        System.out.println("Created string of length " + appended.length() + " in " + totalTime + " ms.");
     }
 }
diff --git a/core-java-modules/core-java-strings/src/test/java/com/ossez/chararraypassword/PasswordStoreExamplesUnitTest.java b/core-java-modules/core-java-strings/src/test/java/com/ossez/chararraypassword/PasswordStoreExamplesUnitTest.java
index 66f8d0d078..bc156a1a21 100644
--- a/core-java-modules/core-java-strings/src/test/java/com/ossez/chararraypassword/PasswordStoreExamplesUnitTest.java
+++ b/core-java-modules/core-java-strings/src/test/java/com/ossez/chararraypassword/PasswordStoreExamplesUnitTest.java
@@ -9,7 +9,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 /**
  * Java Password by using String or Char array
  * <p>
- * * <p><a href="https://www.ossez.com/t/java-char-array-string/14015">https://www.ossez.com/t/java-char-array-string/14015</a></p>
+ * <p><a href="https://www.ossez.com/t/java-char-array-string/14015">https://www.ossez.com/t/java-char-array-string/14015</a></p>
  */
 public class PasswordStoreExamplesUnitTest {
 
diff --git a/core-java-modules/core-java-strings/src/test/java/com/ossez/multiline/MultiLineStringUnitTest.java b/core-java-modules/core-java-strings/src/test/java/com/ossez/multiline/MultiLineStringUnitTest.java
index f744cdfc29..9e9230ef8d 100644
--- a/core-java-modules/core-java-strings/src/test/java/com/ossez/multiline/MultiLineStringUnitTest.java
+++ b/core-java-modules/core-java-strings/src/test/java/com/ossez/multiline/MultiLineStringUnitTest.java
@@ -2,6 +2,7 @@ package com.ossez.multiline;
 
 import org.junit.Test;
 
+import javax.swing.*;
 import java.io.IOException;
 
 import static org.junit.Assert.assertEquals;
diff --git a/core-java-modules/core-java-strings/src/test/java/com/ossez/stringpool/StringPoolUnitTest.java b/core-java-modules/core-java-strings/src/test/java/com/ossez/stringpool/StringPoolUnitTest.java
index 866d1889ef..0e445458a3 100644
--- a/core-java-modules/core-java-strings/src/test/java/com/ossez/stringpool/StringPoolUnitTest.java
+++ b/core-java-modules/core-java-strings/src/test/java/com/ossez/stringpool/StringPoolUnitTest.java
@@ -3,37 +3,44 @@ package com.ossez.stringpool;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import org.junit.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class StringPoolUnitTest {
 
+    private static Logger logger = LoggerFactory.getLogger(StringPoolUnitTest.class);
+
     @Test
     public void whenCreatingConstantStrings_thenTheirAddressesAreEqual() {
-        String constantString1 = "Baeldung";
-        String constantString2 = "Baeldung";
+        String constantString1 = "HoneyMoose";
+        String constantString2 = "HoneyMoose";
 
         assertThat(constantString1).isSameAs(constantString2);
     }
 
     @Test
     public void whenCreatingStringsWithTheNewOperator_thenTheirAddressesAreDifferent() {
-        String newString1 = new String("Baeldung");
-        String newString2 = new String("Baeldung");
+        String newString1 = new String("HoneyMoose");
+        String newString2 = new String("HoneyMoose");
 
         assertThat(newString1).isNotSameAs(newString2);
+
+        logger.info("newString1 Address: {}", System.identityHashCode(newString1));
+        logger.info("newString2 Address: {}", System.identityHashCode(newString2));
     }
 
     @Test
     public void whenComparingConstantAndNewStrings_thenTheirAddressesAreDifferent() {
-        String constantString = "Baeldung";
-        String newString = new String("Baeldung");
+        String constantString = "HoneyMoose";
+        String newString = new String("HoneyMoose");
 
         assertThat(constantString).isNotSameAs(newString);
     }
 
     @Test
     public void whenInterningAStringWithIdenticalValueToAnother_thenTheirAddressesAreEqual() {
-        String constantString = "interned Baeldung";
-        String newString = new String("interned Baeldung");
+        String constantString = "interned HoneyMoose";
+        String newString = new String("interned HoneyMoose");
 
         assertThat(constantString).isNotSameAs(newString);