static 问题

class Bowl {
	Bowl(int marker) {
		System.out.println("Bowl(" + marker + ")");
	}

	void f1() {
		System.out.println("Ok");
	}
}

class Cupboard {
	Bowl b1 = new Bowl(1);

	static Bowl b2 = new Bowl(2);

	Cupboard() {
		System.out.println("Cupboard()");
	}

	static Bowl b3 = new Bowl(3);
}

class Table {
	Table() {
		System.out.println("Table()");
	}

	Table(String a, int i) {
		this();
		System.out.println("Ok");
	}
}

public class Order {
	static Cupboard t1 = new Cupboard();

	static Table t2;

	Bowl t3 = new Bowl(10);

	void print() {
		t3.f1();
	}

	public static void main(String[] args) {
		System.out.println("Creating new Cupboard() in main");
		new Cupboard();
		System.out.println("Creating new Cupboard() in main");
		Order od = new Order();
		od.t3.f1();
		Table t4 = new Table("aa", 1);
	}
}

输出结果：

Bowl(2)
Bowl(3)
Bowl(1)
Cupboard()
Creating new Cupboard() in main
Bowl(1)
Cupboard()
Creating new Cupboard() in main
Bowl(10)
Ok
Table()
Ok

static属性只初始化一次。