Run Android Java console program

$ cat Hello.java

class Hello {

        public static void main(String[] args) {

                System.out.println("Hello World!");

        }

}

$ javac Hello.java

$ dx --version

dx version 1.7

$ dx --dex --output=Hello.dex Hello.class

$ ls

Hello.class  Hello.dex  Hello.java

$ adb push Hello.dex /data/local/tmp/

4.0 User版:

$ adb shell dalvikvm -cp /data/local/tmp/Hello.dex Hello

Dalvik VM unable to locate class 'Hello'

java.lang.NoClassDefFoundError: Hello

        at dalvik.system.NativeStart.main(Native Method)

Caused by: java.lang.ClassNotFoundException: Hello

        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:501)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:461)

        ... 1 more

4.0 Eng版:

$ adb shell dalvikvm -cp /data/local/tmp/Hello.dex Hello

Hello World!