继承和构造方法重载.doc

publicclassFather{
Stringname;
intage;
publicFather(){//构造方法的重载

}

publicFather(Stringname){
this.name=name;
System.out.println("name");
}

publicFather(intage){
this.age=age;
System.out.println("age");

}

publicFather(Stringname,intage){
this.name=name;
this.age=age;
System.out.println("name,age");
}
}

packagecom.lijie.lianxi6;

importorg.omg.CORBA.PUBLIC_MEMBER;

publicclassSonextendsFather{

//Stringname;//因为继承了Father的属性和方法，所以可以省略，起到了简化代码的作用
//intage;//要访问这些属性和方法就直接去父类那里访问

publicSon(){
System.out.println("son空参数的构造方法....");
}

publicSon(Stringname){
super(name);//第1种调用：单独用时，放在首位，this也一样.
//this.name=name;第2种调用
//super.name=name;第3种调用
System.out.println("sonname空参数的构造方法....");
}

publicSon(Stringname,intage){
super(name,age);
this.name=name;
this.age=age;
System.out.println("sonnameage参数的构造方法....");
}

publicstaticvoidmain(String[]args){

//PUBLIC_MEMBER,不要在main方法里写public

//Sonson=newSon();
System.out.println("------------------");

Sonson2=newSon("xiao",10);
System.out.println(son2.name);//去到父类那里访问
System.out.println(son2.age);

}

}