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JavaPԇ֪Rc(din)

r(sh)g2024-07-18 09:15:07 JAVAJC ҪͶ
  • P(gun)]

JavaPԇ֪Rc(din)\

JavaṩObject(li)(li)^P(gun)ϵͬһõĘ(sh)(li)Object(li)Object(li)܏(jng)(hu )ʹõ(li)СռJavaPԇ֪Rc(din)ϣJx!

JavaPԇ֪Rc(din)\

1.@ClassNʽ

// 1. o(li)(li)@ (li)d

String classname = "cn.itcast.reflect.Person";// (li)ļ

Class clazz = Class.forName(classname);// ˌPerson.class

// 2. õˌ֪ʲô(li) ګ@Ì(li)

Object obj = new Person();

Class clazz1 = obj.getClass();// @Ìw(li)

// 3. _ث@ij(g)(li)Class Ҫڂ

Class clazz2 = Person.class;

һJava(chung )Ď׷Nʽ

(1) newZ(y)䄓(chung )@Ҋ(jin)Ą(chung )ķ

(2) \÷ֶ,{java.lang.Classjava.lang.reflect.Constructor(li)newInstance()(sh)

(3) {Ìclone()

(4) \÷лֶ{java.io.ObjectInputStream readObject()

(1)(2)(hu )_@ʽ{Ø캯 ;(3)ڃȴόЌӰӡԲ(hu ){Ø캯 ;(4)Ǐļ߀ԭ(li)ČҲ(hu ){Ø캯

2.Java׃Ϸ

$ ĸ„(xin)_(ki)^Ŀǔĸ„(xin);Ԕ_(ki)^JavaP(gun)I

3.

abstractstaticnativesynchronized

native•طoϵyȥ(sh)FJNI{Õr(sh)ʹ

4.oB(ti)׃Main

Mainпֱʹstatic(li)׃ֱʹ÷oB(ti)׃ʹ÷oB(ti)׃Ҫnewʹ

oB(ti){÷oB(ti)ķ׃(ѽ(jng)ڵĖ|߀ڵĖ|);oB(ti)ֱ{oB(ti)׃ҽoxֵڷoB(ti)жxoB(ti)׃;

5.L(fng)(wn)((li)(li)ⲿ)

(1)publicԱ(li)L(fng)(wn)(all)

(2)privateֻܱԼL(fng)(wn)޸(li)

(3)protected(li)ͬһ(g)(li)L(fng)(wn) (li)(li)

(4)default(ĬJ)ͬһе(li)L(fng)(wn)•r(sh)](mi)мJfriendly (li)

6.Java^еĘ췽

(1)(li)Ę^(gu)б{(li)Ę췽

(2)(li)ԼĘ췽ʹsuper(argument_list){û(li)Ę췽

2.1ʹthis(argument_list){ñ(li)☋췽

2.2{super회(xi)(li)췽ĵһ

(3)(li)Ę췽Л](mi)@ʾ{û(li)Ę췽tϵyĬJ{û(li)ğo(w)췽

(4)(li)췽мț](mi)@ʾ{û(li)췽(li)֛](mi)Пo(w)Ę췽tge

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