java

.devcontainer/Dockerfile

-FROM hb.eazytec-cloud.com/eazytec/node:ubuntu
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+FROM hb.eazytec-cloud.com/eazytec/eazydevelop-base:ubuntu
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.devcontainer/devcontainer.json

 {
+    "name": "Java Development Environment",
+    "image": "mcr.microsoft.com/devcontainers/base:ubuntu",
     "build": {
         "dockerfile": "Dockerfile"
+    },
+    "features": {
+        "ghcr.io/devcontainers/features/java:1.6.3": {
+            "version": "17",
+            "installMaven": true,
+            "installGradle": true
+        },
+        "ghcr.io/devcontainers/features/common-utils:2": {
+            "installZsh": true,
+            "configureZshAsDefaultShell": true,
+            "installOhMyZsh": true,
+            "upgradePackages": true
         }
+    },
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "vscjava.vscode-java-pack",
+                "vscjava.vscode-maven",
+                "vscjava.vscode-gradle",
+                "redhat.java",
+                "vscjava.vscode-java-debug",
+                "vscjava.vscode-java-test"
+            ],
+            "settings": {
+                "java.home": "/usr/local/openjdk-17",
+                "java.configuration.updateBuildConfiguration": "automatic",
+                "java.compile.nullAnalysis.mode": "automatic"
+            }
+        }
+    },
+    "postCreateCommand": "java -version && mvn -version && gradle -version",
+    "remoteUser": "vscode"
 }
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README.md

+# Java DevContainer Demo
+
+这是一个使用 DevContainer Features 的 Java 开发环境演示项目。
+
+## 特性
+
+- ✅ Java 17 运行时
+- ✅ Maven 构建工具
+- ✅ Gradle 构建工具
+- ✅ JUnit 测试框架
+- ✅ VS Code Java 扩展
+- ✅ Oh My Zsh 终端
+
+## 快速开始
+
+1. 在 VS Code 中打开项目
+2. 按 `Ctrl+Shift+P` (Windows/Linux) 或 `Cmd+Shift+P` (Mac)
+3. 选择 "Dev Containers: Reopen in Container"
+4. 等待容器构建完成
+
+## 运行项目
+
+### 使用 Maven
+```bash
+# 编译
+mvn compile
+
+# 运行测试
+mvn test
+
+# 运行主类
+mvn exec:java -Dexec.mainClass="com.example.App"
+
+# 打包
+mvn package
+```
+
+### 使用 Gradle
+```bash
+# 编译
+gradle compileJava
+
+# 运行测试
+gradle test
+
+# 运行主类
+gradle run
+
+# 打包
+gradle build
+```
+
+## 项目结构

pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<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>com.example</groupId>
+    <artifactId>java-demo</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>Java Demo</name>
+    <description>A simple Java demo project</description>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <sourceDirectory>src</sourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <source>17</source>
+                    <target>17</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>
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src/main/java/com/example/App.java

+package com.example;
+
+/**
+ * 主应用程序类
+ * @author Demo User
+ * @version 1.0
+ */
+public class App {
+    
+    /**
+     * 主方法
+     * @param args 命令行参数
+     */
+    public static void main(String[] args) {
+        System.out.println("🎉 欢迎使用 Java DevContainer!");
+        System.out.println("Java 版本: " + System.getProperty("java.version"));
+        System.out.println("Java 供应商: " + System.getProperty("java.vendor"));
+        
+        // 演示一些 Java 17 特性
+        demoJava17Features();
+        
+        // 演示计算功能
+        Calculator calculator = new Calculator();
+        int result = calculator.add(10, 20);
+        System.out.println("10 + 20 = " + result);
+    }
+    
+    /**
+     * 演示 Java 17 新特性
+     */
+    private static void demoJava17Features() {
+        System.out.println("\n�� Java 17 新特性演示:");
+        
+        // Text blocks (Java 15+)
+        String json = """
+            {
+                "name": "Java Demo",
+                "version": "17",
+                "features": ["Text Blocks", "Pattern Matching", "Records"]
+            }
+            """;
+        System.out.println("Text Blocks 示例:");
+        System.out.println(json);
+        
+        // Pattern matching (Java 16+)
+        Object obj = "Hello Java 17";
+        if (obj instanceof String str) {
+            System.out.println("字符串长度: " + str.length());
+        }
+    }
+}
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src/main/java/com/example/Calculator.java

+package com.example;
+
+/**
+ * 简单计算器类
+ * @author Demo User
+ * @version 1.0
+ */
+public class Calculator {
+    
+    /**
+     * 加法运算
+     * @param a 第一个数
+     * @param b 第二个数
+     * @return 两数之和
+     */
+    public int add(int a, int b) {
+        return a + b;
+    }
+    
+    /**
+     * 减法运算
+     * @param a 被减数
+     * @param b 减数
+     * @return 两数之差
+     */
+    public int subtract(int a, int b) {
+        return a - b;
+    }
+    
+    /**
+     * 乘法运算
+     * @param a 第一个数
+     * @param b 第二个数
+     * @return 两数之积
+     */
+    public int multiply(int a, int b) {
+        return a * b;
+    }
+    
+    /**
+     * 除法运算
+     * @param a 被除数
+     * @param b 除数
+     * @return 两数之商
+     * @throws ArithmeticException 当除数为0时抛出
+     */
+    public double divide(int a, int b) {
+        if (b == 0) {
+            throw new ArithmeticException("除数不能为0");
+        }
+        return (double) a / b;
+    }
+}
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src/test/java/com/example/CalculatorTest.java

+package com.example;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+/**
+ * 计算器测试类
+ * @author Demo User
+ * @version 1.0
+ */
+public class CalculatorTest {
+    
+    private Calculator calculator = new Calculator();
+    
+    @Test
+    public void testAdd() {
+        assertEquals("加法测试失败", 15, calculator.add(10, 5));
+        assertEquals("加法测试失败", 0, calculator.add(-5, 5));
+        assertEquals("加法测试失败", -10, calculator.add(-5, -5));
+    }
+    
+    @Test
+    public void testSubtract() {
+        assertEquals("减法测试失败", 5, calculator.subtract(10, 5));
+        assertEquals("减法测试失败", -10, calculator.subtract(-5, 5));
+        assertEquals("减法测试失败", 0, calculator.subtract(-5, -5));
+    }
+    
+    @Test
+    public void testMultiply() {
+        assertEquals("乘法测试失败", 50, calculator.multiply(10, 5));
+        assertEquals("乘法测试失败", -25, calculator.multiply(-5, 5));
+        assertEquals("乘法测试失败", 25, calculator.multiply(-5, -5));
+    }
+    
+    @Test
+    public void testDivide() {
+        assertEquals("除法测试失败", 2.0, calculator.divide(10, 5), 0.001);
+        assertEquals("除法测试失败", -1.0, calculator.divide(-5, 5), 0.001);
+        assertEquals("除法测试失败", 1.0, calculator.divide(-5, -5), 0.001);
+    }
+    
+    @Test(expected = ArithmeticException.class)
+    public void testDivideByZero() {
+        calculator.divide(10, 0);
+    }
+}
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target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

+/Users/xiezhi/work/code/ide/cursor/devcontainer/eazy-code-server-devcontainer/src/main/java/com/example/Calculator.java
+/Users/xiezhi/work/code/ide/cursor/devcontainer/eazy-code-server-devcontainer/src/main/java/com/example/App.java