java变量初始化
class Singleton {
private static Singleton singleton = new Singleton();
public static int counter1;
public static int counter2 = 0;
private Singleton() {
counter1++;
counter2++;
}
public static Singleton getInstance() {
return singleton;
}
}
public class TestSingleton {
public static void main(String[] args) {
Singleton s = Singleton.getInstance();
System.out.println(Singleton.counter1);
System.out.println(Singleton.counter2);
}
}输出结果是1，0
为什么
