本文探讨了Java编程中通过类继承和多态实现不同性别角色的抽象概念，具体展示了如何通过方法重载和类继承来区分和创建男孩和女孩对象。
package com.qianfeng.demo5;
public class Mother{
//sex= 1 男孩
//sex= 0 女孩
publicPerson birth(int sex){
if(sex == 1){
returnnew Boy("男");
}else{
returnnew Girl("女");
}
}
publicPerson birth2(int sex){
class Boy extends Person{
publicBoy(String sex) {
super(sex);
}
}
class Girl extends Person{
publicGirl(String sex) {
super(sex);
}
}
if(sex == 1){
returnnew Boy("男");
}else{
returnnew Girl("女");
}
}
publicPerson birth3(int sex){
if(sex == 1){
returnnew Person(){
int age = 0;
String sex = "男";
};
}else{
returnnew Girl("女");
}
}
}
package com.qianfeng.demo5;
public class Person {
publicString sex;
publicint age;
publicPerson(String sex){
this.sex = sex;
}
publicPerson(){
}
}
package com.qianfeng.demo5;
public class Girl extends Person {
publicGirl(String sex) {
super(sex);
// TODO Auto-generated constructor stub
}
}
package com.qianfeng.demo5;
public class Boy extends Person {
publicBoy(String sex) {
super(sex);
// TODO Auto-generated constructor stub
}
}
package com.qianfeng.demo4;
public class Outer {
publicint a = 1;
publicstatic int b = 2;
publicvoid method(){
final int abb = 22;
class Inner{
publicint a = 33;
//单单使用static修饰的变量不能再局部内部类中定义
//配合final使用则表示常量
//publicstatic int b = 22;
publicvoid method(){
System.out.println(a);
//Local variable abb defined in anenclosing
//scope must be final or effectivelyfinal
//a = abb;
//abb++;
System.out.println(abb);
}
//Themethod method2 cannot be declared static;
//staticmethods can only be declared in a static or top level type
/*publicstatic void method2(){
}*/
}
//abb++;
System.out.println(abb);
Inner inner = new Inner();
inner.method();
}
publicstatic void main(String[] args) {
Outer outer = new Outer();
outer.method();
}
}
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