Java Basic(47)-Static(2)

public class tuna {

private String first;

private String last;

private static int members = 0;

public tuna(String fn,String ln){

first = fn;

last = ln;

members++;

System.out.printf("Construtor for %s %s,members in the club: %d\n",first,last,members);

}

public String getFirst(){

return first;

}

public String getLast(){

return last;

}

public static int getMembers(){

return members;

}

}

class apples{

public static void main(String[] args){

tuna member1 = new tuna("Megan","Fox");

tuna member2 = new tuna("Natalie","Portman");

tuna member3 = new tuna("Taylor","Swift");

System.out.println(tuna.getMembers());

}

}

因為靜態方法是共享所有的對象

這是運行時的結果：

Construtor for Megan Fox,members in the club: 1

Construtor for Natalie Portman,members in the club: 2

Construtor for Taylor Swift,members in the club: 3