teststudent.java

来自「这是一张java应用教程的随书光盘」· Java 代码 · 共 19 行

class Student {
	private int id;
	private static int grade = 0;
	public static int getGradeStudent () { 
		return grade;
	}
	public Student () {
		grade ++;
		id = grade;
	}
}
class Teststudent{
	public static void main(String[] args) {
		System.out.println(Student. getGradeStudent ());
		Student s1 = new Student ();
		System.out.println(Student. getGradeStudent ());
	}
}