classAnimal{voidmakeSound(){System.out.println("Animal sound");}}classDogextendsAnimal{voidmakeSound(){System.out.println("Bark");}}classCatextendsAnimal{voidmakeSound(){System.out.println("Meow");}}publicclassDynamicDispatchExample{publicstaticvoidmain(String[]args){AnimalmyDog=newDog();// 上...
参考:http://www.studytonight.com/java/dynamic-method-dispatch.php https://www.programcreek.com/2011/11/what-do-java-objects-look-like-in-memory/
1//Dynamic Method Dispatch2classA3{4voidcallme()5{6System.out.println("Inside A's callme method");7}8}910classBextendsA11{12//override callme()13voidcallme()14{15System.out.println("Inside B's callme method");16}17}1819classCextendsA20{21//override callme()22voidcallme()23{24Sy...
package org.apache.ibatis.binding; import java.io.Serializable; import java.lang.invoke.MethodHandles; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.Map; import org.apache.ibatis.la...
这种根据对象的实际类型而不是声明类型来选择并调用方法的过程也叫做动态分派(Dynamic Dispatch)...
参考:http://www.studytonight.com/java/dynamic-method-dispatch.php
分派Dispatch1.静态分派 英文一般是“Method Overload Resolution”,所以其实是个动态概念 Human hu = new Man(): 面代码中的“Human”称为变量的静态类型(Static Type)或者外观类型(Apparent Type),后面的“Man”则称为变量的实际类型(Actual Type),静态类型和实际类型在程序中都可以发生一些变化,区别是静态类型的...
4: invokespecial #3 // Method com/xiaolyuh/DynamicDispatch$Man."<init>":()V7: astore_18: new #4 // class com/xiaolyuh/DynamicDispatch$Woman11: dup12: invokespecial #5 // Method com/xiaolyuh/DynamicDispatch$Woman."<init>":()V15: astore_216: aload_117: invokevirtual #6 // ...
public class DynamicDispatch { static abstract class Human { protected abstract void sayHello(); } static class Man extends Human { @override protected void sayHello() { System.out.println("Man Say Hello!"); } } static class Woman extends Human { @override protected void sayHello() { System...
Efficient Dynamic Method Dispatch on the Java Virtual MachineCopyright (c) Bastian Muller, 2013 This work is licensed under a Creative CommonsAttribution-NonCommercial-ShareAlike 3.0 Unported Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/Bastian Müller...