diff --git a/OnJava/OnJava/pom.xml b/OnJava/OnJava/pom.xml
new file mode 100644
index 0000000..706edef
--- /dev/null
+++ b/OnJava/OnJava/pom.xml
@@ -0,0 +1,25 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.kane</groupId>
+  <artifactId>OnJava</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <packaging>jar</packaging>
+
+  <name>OnJava</name>
+  <url>http://maven.apache.org</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>3.8.1</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+</project>
diff --git a/OnJava/OnJava/src/main/java/org/kane/App.java b/OnJava/OnJava/src/main/java/org/kane/App.java
new file mode 100644
index 0000000..60173f5
--- /dev/null
+++ b/OnJava/OnJava/src/main/java/org/kane/App.java
@@ -0,0 +1,13 @@
+package org.kane;
+
+/**
+ * Hello world!
+ *
+ */
+public class App 
+{
+    public static void main( String[] args )
+    {
+        System.out.println( "Hello World!" );
+    }
+}
diff --git a/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim1.java b/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim1.java
new file mode 100644
index 0000000..6f02534
--- /dev/null
+++ b/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim1.java
@@ -0,0 +1,18 @@
+/*
+ * @Author: Kane
+ * @Date: 2024-03-18 15:12:07
+ * @LastEditors: Kane
+ * @FilePath: /OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim1.java
+ * @Description: 
+ * 
+ * Copyright (c) ${2023} by Kane, All Rights Reserved. 
+ */
+package org.kane.chapter10.接口同名方法;
+
+public interface Jim1
+{
+    default public void jim()
+    {
+        System.out.println();
+    }
+}
\ No newline at end of file
diff --git a/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim2.java b/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim2.java
new file mode 100644
index 0000000..58dd7d8
--- /dev/null
+++ b/OnJava/OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim2.java
@@ -0,0 +1,18 @@
+/*
+ * @Author: Kane
+ * @Date: 2024-03-18 15:19:06
+ * @LastEditors: Kane
+ * @FilePath: /OnJava/src/main/java/org/kane/chapter10/接口同名方法/Jim2.java
+ * @Description: 
+ * 
+ * Copyright (c) ${2023} by Kane, All Rights Reserved. 
+ */
+package org.kane.chapter10.接口同名方法;
+
+public interface Jim2
+{
+    default public void jim( String message )
+    {
+        System.out.println(message);
+    }
+}
\ No newline at end of file
diff --git a/OnJava/OnJava/src/test/java/org/kane/AppTest.java b/OnJava/OnJava/src/test/java/org/kane/AppTest.java
new file mode 100644
index 0000000..d8ba3a7
--- /dev/null
+++ b/OnJava/OnJava/src/test/java/org/kane/AppTest.java
@@ -0,0 +1,38 @@
+package org.kane;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+    extends TestCase
+{
+    /**
+     * Create the test case
+     *
+     * @param testName name of the test case
+     */
+    public AppTest( String testName )
+    {
+        super( testName );
+    }
+
+    /**
+     * @return the suite of tests being tested
+     */
+    public static Test suite()
+    {
+        return new TestSuite( AppTest.class );
+    }
+
+    /**
+     * Rigourous Test :-)
+     */
+    public void testApp()
+    {
+        assertTrue( true );
+    }
+}