fish []f=new fish[3];
f[0]= new fish();
f[1]=new fish();
f[2]=new fish();
f[0].age=2;
f[0].name="娃娃鱼";
f[0].type="feiy";

f[1].age=2;
f[1].name="娃娃鱼";
f[1].type="feiy";

f[2].age=2;
f[2].name="娃娃鱼";
f[2].type="feiy";


for(fish k:f){
System.out.println(k.age
);
}

}

}
class fish{
String name;
String type;
int age;


}

遍历练习