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    Javaµ±ÖеÄÐòÁл¯£¬ÆäÖ÷ÒªµÄ×÷ÓÃÊǽ«ÀàµÄʵÀý½øÐÐÎÞËð´«Ê䣬»òÕß˵¾ÍÊÇͨ¹ýJavaµÄÐòÁл¯»úÖÆ£¬JavaÀàµÄʵÀý¿ÉÒÔͨ¹ýObjectÁ÷À´´«ÊäºÍÖØÐ»ñÈ¡£¬¶ø²»»áËð»µÀàµÄʵÀý¡£
    Ê×ÏÈ£¬ÎÒÃÇ¿´¿´Ê²Ã´ÑùµÄÀàÊÇÐòÁл¯À࣬
      1.AÀà×ÔÉíʵÏÖÁËSerializable½Ó¿ÚµÄÀࣻ
      2.AÀà×ÔÉíûÓÐʵÏÖSerializable½Ó¿Ú£¬µ«Æä¸¸ÀàʵÏÖÁËSerializable½Ó¿ÚµÄÀࣻ
    ÒÔÉÏÁ½ÖÖ£¬ÎÒÃÇÈÏΪÊÇÀàAÊÇÐòÁл¯Àà¡£
    ÔÚSCJP¿¼ÊÔµ±ÖоÍÓÐÒ»µÀ¹ØÓÚÐòÁл¯µÄÌâÄ¿£º
    import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
class Food implements Serializable{
Food() {
System.out.print("1");
}
}
class Fruit extends Food implements Serializable {
Fruit() {
System.out.print("2");
}
}
public class Banana2 extends Fruit {
int size = 42;
public static void main(String[] args) {
Banana2 b = new Banana2();
b.serializeBanana2(b); // assume correct serialization
b = b.deserializeBanana2(b); // assume correct
System.out.println(" restored " + b.size + " ");
}
// more Banana2 methods
public static void serializeBanana2(Banana2 b) {
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("c:/a.txt"));
out.writeObject(b);
} catch (Exception e) {
e.printStackTrace();
}
}
public static Banana2 deserializeBanana2(Banana2 b) {
try {
ObjectInputStream in = new ObjectInputStream(new FileInputStream("c:/a.txt"));
return (Banana2) in.readObject();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

ÕâµÀÌâµÄÊä³ö½á¹ûÊÇ£º121 restored 42
    ´ÓÔËÐнá¹ûÀ´¿´£ºÇ°Á¬¸öÊý×Ö12ÊÇÏÔ¶øÒ×¼ûµÄ£¬ÔÚnew Banana2()µÄʱºòÖ´Ðе쬵«ÊǵÚÈý¸ö1¾Í²»ºÃÀí½âÁË£¬Æäʵ£¬Èç¹û´Ó¶à̬µÄ½Ç¶È¿¼ÂÇ£¬Ò²²»ÄÑÀí½â£¬ÒòΪ·´ÐòÁл¯ÊÇÒªµÃµ½Ô­ÀàµÄʵÀý£¬¶øÕâ¾ÍÐèÒªÔÚ·´ÐòÁл¯Ö®Ç°¾ÍµÃÉùÃ÷Ò»¸öԭʼÀà»òÕßÔ­


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javaÄÚ²¿Àà¼Ì³ÐʾÀý£¡

package innerClass.test;
public class InheritTest
{
    public static void main(String[] args)
    {
        Person p = new Person("LMS");
        p.show();
      ......

¶Ôjava¼¼ÊõStringµÄ̽ÌÖ

ÒªÀí½â javaÖÐStringµÄÔË×÷·½Ê½£¬±ØÐëÃ÷È·Ò»µã£ºStringÊÇÒ»¸ö·Ç¿É±äÀࣨimmutable£©¡£Ê²Ã´ÊǷǿɱäÀàÄØ£¿¼òµ¥ËµÀ´£¬·Ç¿É±äÀàµÄʵÀýÊDz»Äܱ»Ð޸ĵģ¬Ã¿¸öʵÀýÖаüº¬µÄÐÅÏ¢¶¼±ØÐëÔÚ¸ÃʵÀý´´½¨µÄʱºò¾ÍÌṩ³öÀ´£¬²¢ÇÒÔÚ¶ÔÏóµÄÕû¸öÉú´æÖÜÆÚÄڹ̶¨²»±ä¡£javaΪʲôҪ°ÑStringÉè¼ÆÎª·Ç¿É±äÀàÄØ£¿Äã¿ÉÒÔÎÊÎÊ james Gosling £º£©¡£µ ......

Java¼æÈÝÐÔÓ밲ȫÐÔÉèÖÃ


    ΪÁËʹ²Ù×÷ϵͳ֧³ÖJava£¬¿ÉÓÉSun¹«Ë¾µÄJavaÏÂÔØÍøÒ³, ¸ù¾Ý²Ù×÷ϵͳÀàÐÍÏÂÔØºÍ°²×°Ò»¸öÃâ·ÑJRE(Java Runtime Environment), ÀýÈç, JRE6¡£È»ºó, ½«±¾ÎļþÏÂÔØ±£´æ, ¿½±´, ²¢Õ³Ìùµ½JREËùÔÚµÄsecurityĿ¼, ÀýÈç, C:/Program Files/Java/jre6/lib/security/, Ìæ»»Ô­ÓеÄÎļþjava.policy, ÉèÖÃJREÍê³É¡£ ......

ÓûìÏýÆ÷±£»¤ÄãµÄJAVA(.class)´úÂë(Ò»)

JAVA´úÂë±àÒëºóÊÇ.classÎļþ,ͨ¹ý·´±à¹¤¾ßºÜÈÝÒ×±»±ðÈË¿´µ½Ô´´úÂë
±£»¤JAVA´úÂëµÄ·½·¨ºÜ¶à£¬ÏÂÃæ½éÉÜÒ»ÖֱȽϷ½±ãʹÓõķ½·¨¡£
   obfuscate4eÊÇÒ»¿î²ÉÓûìÏýÆ÷¸Ä±äCLASSÎļþÄÚÈݵķ½·¨¡£
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1.ÏÂÔØobfuscate4e,¼ÓÈëÕ¾µãhttp://obfuscate4e.org/updates/,Õâ¸öÈí¼þÊǵ¹úÈË¿ª· ......

java µ÷ÓÃdllÎļþ

//1.´´½¨testdll.javaÎļþ
public class testdll
{
static
{
System.loadLibrary("goodluck");
}
public native static int get();
public native static void set(int i);
public static void main(String[] args)
{
testdll test = new testdll();
test.set(10);
System.out.println(test.get() ......
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