函数的分类:普通方法(original way)、构造方法(construct way)、抽象方法(abstract way)
The java constructor:(1)only use when a class need to be constructed
(2)the name of way should be same as the class's name
(3)needn't write a return value but it must return an address of
the way in the RAM.
its effect is to build a class,only be used when build a class
fundamental form :access authority class name(){}
eg.
public class defend{
String name;
int blood;
public void setName(String n){
name=n;
}
public String getName(){
return name;
}
public void setBlood(int m){
blood=m;
}
public int getBlood(){
return blood;
}
public void action(attend d){
int b = d.getBlood();
b--;
d.setBlood(b);
System.out.println(name+"攻击"+d.getName()+","+d.getName()+"的剩余血量为"+d.getBlood());
}
}
overload
the names are same but parameters' numeber,type,the reorder,one of the three isn't
same .It is the other function.
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