多態(tài)分為靜態(tài)多態(tài)--在運(yùn)行前就已經(jīng)確定要執(zhí)行的代碼塊，體現(xiàn)在代碼中就是方法的重載；

public?class?Test{
????public?void?say(){
????System.out.println("Hello?World");
????}
????public?void?say(String?s){
????System.out.println(s);
????}
????public?static?void?main(String[]?args){
????????new?Test().say();//在運(yùn)行前確定了要執(zhí)行的代碼塊
????????//new?Test().say("Hello?World");
????}
}

動(dòng)態(tài)多態(tài)--在運(yùn)行前無(wú)法確定要執(zhí)行的代碼塊具體是什么，體現(xiàn)在代碼中就是接口回調(diào)和父類對(duì)象引用指向子類對(duì)象

public?class?Animal{
????public?void?say(){
????System.out.println("動(dòng)物會(huì)叫");
????}
}
class?Dog?extends?Animal{
????public?void?say(){
????????System.out.println("汪汪汪~~");
????}
}
class?Snake?extends?Animal{
????public?void?say(){
????????System.out.println("嘶嘶嘶~~");
????}
}
class?Test{
????public?void?test(Animal?animal){
????????????animal.say();
????????}
????public?static?void?main(){
????????new?Test().test(new?Animal());//輸出動(dòng)物會(huì)叫
????????//new?Test().test(new?Dog());//多態(tài)，輸出汪汪汪
????????//new?Test().test(new?Snake());//多態(tài)，輸出嘶嘶嘶
????}
}

在同一個(gè)方法中，由于參數(shù)類型不同導(dǎo)致執(zhí)行結(jié)果不同的現(xiàn)象就是多態(tài)。

程序員分各種語(yǔ)言的程序員，比如 java,python,c，這就是多態(tài)