android平台 java程序 编译

import java.util.*;

public class Hello {

    public static void main(String[] args) {

        System.out.println(new Date());

        Properties p = System.getProperties();

        p.list(System.out);

        System.out.println("--- Memory Usage:");

        Runtime rt = Runtime.getRuntime();

        System.out.println( "Total Memory = " + rt.totalMemory() +

                            " Free Memory = "  + rt.freeMemory() + 
"maxMemory = " + rt.maxMemory() );

    }

}

hello.sh

javac Hello.java

java -jar dx.jar --dex --output=Hello.dex Hello.class

adb push Hello.dex /data/test/

adb shell dalvikvm -cp /data/test/Hello.dex Hello