J2ME CDC（Connected Device Configuration，连接式设备配置集）使用CVM，面向那些具有更强计算能力的嵌入式设备，包含了Java类库的核心部分，是应用Java技术在嵌入式设备上进行开发所需类库的最小集合。它具有如下优点：高级网络特性：CDC位基于套接字的网络编程技术提供了最新Java API满足Jini技术的需求：基于CDC远程方法调用（RMI）可选包可实现对基于完全Jini技术的设备支持。方便的移植：CDC的Foundation Profile（基础描述集）核心类库包括了广为使用的java.lang、java.net、java.io、java.util、java.security和java.text包清除了deprecated方法：程序更安全、易于理解可以利用更高级的包进行扩展，比如说Personal Basis Profile（PBP个人基础描述集）和Personal Profile（PP个人描述集）等。CDC向小型设备展现了大量的Java 2技术，与Jini技术的结合提高了设备的灵活性，以及能够不断进化发展的能力，实现即插即用，分布计算等等。CDC对资源的要求：内存：2MB ROM、512KB RAM处理器：32位CPU网络连接能力：至少支持UDP，附加的profile可添加对TCP/IP的完全支持用户界面：没有支持图形用户的GUI，可添加描述集实现。
一、选用sun的phoneme https://phoneme.dev.java.net/二、下载 http://download.java.net/mobileembedded/phoneme/advanced/phoneme_advanced-mr2-dev-src-b97-20_nov_2008.zip三、解压 unzip phoneme_advanced-mr2-dev-src-b97-20_nov_2008.zip四、修改makefile cd phoneme_advanced_mr2/cdc/build/linux-arm-generic gedit GNUmakefile 修改 CVM_TARGET_TOOLS_PREFIX=/usr/local/arm/4.3.2/bin/arm-linux- 为自己的交叉编译器的地址 修改 USE_AAPCS ?= false 为 true五、输出PATH export PATH=/usr/local/arm/4.3.2/bin/:$PATH 为自己的交叉编译器的地址六、编译 make 七、如果是使用ubuntu的朋友，可能要安装sun-java6-jdk和另外的一两个工具 Java SDK安装配置 http://wiki.ubuntu.org.cn/Java安装配置 另外的一两个工具可以通过 apt-get install 来安装（出错时会提醒的了，具体我忘了，没有记录）八、出错 ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:45:26: error: asm/ucontext.h: No such file or directory ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:In function 'handleSegv': ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:224: error: dereferencing pointer to incomplete type ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:285: error: dereferencing pointer to incomplete type ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:285: error: dereferencing pointer to incomplete type ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:286: error: dereferencing pointer to incomplete type ../../src/linux-arm/javavm/runtime/segvhandler_arch.c:294: error: dereferencing pointer to incomplete type 修改 segvhandler_arch.c 文件 gedit ../../src/linux-arm/javavm/runtime/segvhandler_arch.c 修改 #define ucontext asm_ucontext #include <asm/ucontext.h> 为 //#define ucontext asm_ucontext //注释掉这句 #include <ucontext.h> //去掉arm/九、编译 make 编译成功！ ls 可以看到在当前目录有 bin lib testclasses.zip十、测试 1)、拷贝上面三个文件与文件夹到开发板/home/j2me目录 2)、在开发板/etc/init.d/rcS文件里加入如下 JAVA_HOME=/home/j2me export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA_HOME/lib 3)、经典的HelloWorld cd /home/j2me/bin ./cvm -cp ../testclasses HelloWorld 可以看到输出了 HelloWorld. 4)、来个全面测试 ./cvm -cp ../testclasses.zip Test *Number of command line arguments: 0 Starting test1 ...recurse ...recurse ...recurse ...link ...link ...link Starting test1 again ...recurse ...recurse ...recurse ...link ...link ...link test6: Caught inner java.lang.NullPointerException test6: Caught outer java.lang.NullPointerException Testing Array Copy *TestE exception thrown because "I'm feeling Testy" *<clinit> threw java.lang.ExceptionInInitializerError *<clinit> threw java.lang.NoClassDefFoundError: StaticE c1 = class [LTest; c2 = class [[LTest; c3 = class [LC; c4 = class [[LC; c1.modifiers = 1041 c2.modifiers = 1041 c3.modifiers = 1040 c4.modifiers = 1040 *FloatMIN =1.4E-45 *FloatMAX =3.4028235E38 FloatMIN (the int bits) =1 FloatMAX (the int bits) =2139095039 java.lang.IllegalArgumentException: too many dimensions at java.lang.reflect.Array.multiNewArray(Native Method) at java.lang.reflect.Array.newInstance(Unknown Source) at Test.testDeepArrayConstruction(Unknown Source) at Test.main(Unknown Source) at sun.misc.CVM.runMain(Unknown Source) Constructed an object of type [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[LTest; finally! Requesting GC with a latency request of 2 seconds (Turning GC tracing on) Sleeping 5 seconds, and waiting for GC's Woke up! Cancelling latency request ............. *CONGRATULATIONS: test Test completed with 411 tests passed and 0 failures *Output lines starting with a * should be checked for correctness *They can be compared to src/share/javavm/test/TestExpectedResult *CONGRATULATIONS: test Test completed with 411 tests passed and 0 failures 这句话意味着什么，我就不说了～～ 恭喜你！
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我的补充：GNUmakefile里有两个USE_AAPCS ，都要改成false否则运行时报Java VM panic: AAPCS calling convention used; compilation must use -DAAPCS
