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+# Java101 Sample Project
+
+This project is a collection of sample codes for learning and practicing the Java programming language. It covers basic syntax, data types, arrays, strings, OOP features, Scanner usage, JVM-related knowledge, and more. It is suitable for Java beginners and developers who wish to strengthen their foundational knowledge.
+
+## Project Structure
+
+The project is primarily divided into the following directories based on functionality and topics:
+
+- `array`: Contains sample code for array operations, such as array reversal, sorting, and filling.
+- `data/type`: Covers Java primitive data types and their usage.
+- `oop`: Demonstrates object-oriented programming concepts, such as method overriding.
+- `scanner`: Shows how to use the `Scanner` class to read input from the console.
+- `string`: Contains examples related to string concatenation and the string constant pool.
+- `jvm/direct/memory`: Covers JVM direct memory operations, such as the use of `ByteBuffer` and `Unsafe` classes.
+- `jvm/gc`: Contains examples related to garbage collection (GC).
+
+## Sample List
+
+Below are some key examples and their descriptions:
+
+### `array` Package Examples
+- **Demo01Print.java**: Demonstrates how to print arrays.
+- **Demo02Reverse.java**: Provides a method `getReverse` to reverse an array.
+- **Demo03Arrays.java**: Uses the `Arrays` class to demonstrate array sorting and filling.
+- **Demo04BubbleSort.java**: Implements the bubble sort algorithm.
+- **Demo05ChessSheet.java**: Prints a chessboard matrix.
+
+### `data/type` Package Examples
+- **Demo01NumericTypes.java**: Demonstrates numeric types in Java.
+- **Demo02BasicTypeCast.java**: Demonstrates primitive type casting and binary and hexadecimal output of numbers.
+
+### `oop` Package Examples
+- **Demo03Override.java**: Demonstrates the concept of method overriding (Override).
+
+### `scanner` Package Examples
+- **Demo01NextLine.java**: Demonstrates the difference between `next` and `nextLine` methods in the `Scanner` class.
+- **Demo02NextFloat.java**: Uses `Scanner` to read floating-point numbers.
+- **Demo03SumAvg.java**: Reads multiple numbers and calculates their sum and average.
+
+### `string` Package Examples
+- **Demo01Concat.java**: Demonstrates different methods of string concatenation.
+- **Demo02Intern.java**: Demonstrates the use of the string constant pool (`intern()`) in Java.
+- **Demo03StringTable.java**: Involves the use and testing of the string table.
+
+### `jvm` Package Examples
+- **direct/memory/Demo01ByteBuffer.java**: Allocates direct memory using `ByteBuffer`.
+- **direct/memory/Demo02Unsafe.java**: Performs unsafe memory operations using the `Unsafe` class.
+- **gc/Demo01.java**: Demonstrates the basic concept of garbage collection.
+
+## Usage Instructions
+
+1. **Download the Code**:
+   Download or clone the code from the [Gitee repository](https://gitee.com/systerror/java101).
+
+2. **Compile the Code**:
+   Compile using the command line:
+   ```bash
+   javac -d out src/com/ror/java/se/**/*.java
+   ```
+
+3. **Run the Examples**:
+   Run specific example classes using the `java` command, for example:
+   ```bash
+   java -cp out com.ror.java.se.array.Demo01Print
+   ```
+
+## Learning Objectives
+
+This project aims to help developers master core Java programming concepts and common operations, including:
+- Array usage and manipulation
+- Primitive data types and type conversion
+- String handling
+- Fundamentals of object-oriented programming
+- Console input handling
+- JVM memory management and garbage collection
+
+## Contribution Guidelines
+
+Pull requests are welcome to help improve or add more examples! Please follow these rules:
+1. The submitted code should clearly demonstrate a specific concept or feature.
+2. Code should include good comments and follow naming conventions.
+3. Test the code before submission to ensure it is error-free.
+
+## License
+
+This project uses the [MIT License](https://opensource.org/licenses/MIT). For details, please refer to the `LICENSE` file in the repository.
+
+For more information, please check the code and comments in each example class.
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+
+
+# Java101 示例项目
+
+本项目是一系列用于学习和练习 Java 编程语言的示例代码，覆盖了基础语法、数据类型、数组、字符串、OOP 特性、Scanner 使用以及 JVM 相关知识等内容。适合 Java 初学者和希望巩固基础知识的开发者学习参考。
+
+## 项目结构
+
+项目主要按照功能和知识点划分为以下目录结构：
+
+- `array`: 包含数组相关操作的示例代码，例如数组反转、排序、填充等。
+- `data/type`: 涉及 Java 基本数据类型及其使用方式。
+- `oop`: 展示面向对象编程概念，如方法重写等。
+- `scanner`: 展示如何使用 `Scanner` 类从控制台读取输入。
+- `string`: 包含字符串拼接、字符串常量池等相关示例。
+- `jvm/direct/memory`: 涉及 JVM 直接内存操作，例如 `ByteBuffer` 和 `Unsafe` 类的使用。
+- `jvm/gc`: 包含与垃圾回收（GC）相关的示例。
+
+## 示例列表
+
+以下是一些关键示例及其功能描述：
+
+### `array` 包示例
+- **Demo01Print.java**: 展示如何打印数组。
+- **Demo02Reverse.java**: 提供一个方法 `getReverse` 用于反转数组。
+- **Demo03Arrays.java**: 使用 `Arrays` 类演示数组的排序与填充功能。
+- **Demo04BubbleSort.java**: 实现冒泡排序算法。
+- **Demo05ChessSheet.java**: 打印一个棋盘矩阵。
+
+### `data/type` 包示例
+- **Demo01NumericTypes.java**: 展示 Java 中的数值类型。
+- **Demo02BasicTypeCast.java**: 演示基本类型转换及数字的二进制、十六进制输出。
+
+### `oop` 包示例
+- **Demo03Override.java**: 演示方法重写（Override）的概念。
+
+### `scanner` 包示例
+- **Demo01NextLine.java**: 演示 `Scanner` 类中 `next` 和 `nextLine` 的区别。
+- **Demo02NextFloat.java**: 使用 `Scanner` 读取浮点数。
+- **Demo03SumAvg.java**: 读取多个数字并计算其总和与平均值。
+
+### `string` 包示例
+- **Demo01Concat.java**: 展示字符串拼接的不同方法。
+- **Demo02Intern.java**: 演示 Java 中字符串常量池 (`intern()`) 的使用。
+- **Demo03StringTable.java**: 涉及字符串表的使用和测试。
+
+### `jvm` 包示例
+- **direct/memory/Demo01ByteBuffer.java**: 使用 `ByteBuffer` 分配直接内存。
+- **direct/memory/Demo02Unsafe.java**: 使用 `Unsafe` 类进行非安全内存操作。
+- **gc/Demo01.java**: 展示垃圾回收的基本概念。
+
+## 使用方式
+
+1. **下载代码**:
+   从 [Gitee 仓库地址](https://gitee.com/systerror/java101) 下载或克隆代码。
+
+2. **编译代码**:
+   使用命令行编译：
+   ```bash
+   javac -d out src/com/ror/java/se/**/*.java
+   ```
+
+3. **运行示例**:
+   使用 `java` 命令运行特定示例类，例如：
+   ```bash
+   java -cp out com.ror.java.se.array.Demo01Print
+   ```
+
+## 学习目标
+
+该项目旨在帮助开发者掌握 Java 编程的核心基础概念和常用操作，包括：
+- 数组的使用与操作
+- 基本数据类型与类型转换
+- 字符串处理
+- 面向对象编程基础
+- 控制台输入处理
+- JVM 内存管理与垃圾回收
+
+## 贡献指南
+
+欢迎提交 Pull Request，帮助我们改进或添加更多示例！请确保遵循以下规则：
+1. 提交的代码需清晰展示特定知识点。
+2. 代码需有良好的注释和命名规范。
+3. 提交前测试代码确保无错误。
+
+## 许可证
+
+本项目使用 [MIT 许可证](https://opensource.org/licenses/MIT)。详情请查看仓库中的 `LICENSE` 文件。
+
+如需进一步信息，请查看每个示例类中的代码和注释。
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