j3_17.java

来自「石志国著《JSP应用教程》」· Java 代码 · 共 19 行

class Person {
	private int id;
	private static int total = 0;
	public static int getTotalPerson() { 
		return total;
	}
	public Person() {
		total++;
		id = total;
	}
}
class TestPerson {
	public static void main(String[] args) {
		System.out.println(Person.getTotalPerson());
		Person p1 = new Person();
		System.out.println(Person.getTotalPerson());
	}
}