类与对象课后作业

package Statistics;
public class Statistics {
    private static int n;
    public Statistics()
    {
        n++; //每次new一个对象是n+1
    }
    public static int getNum()
    {
        return n; 
    }
    public static void main(String[] args){
        Statistics s1=new Statistics();
        Statistics s2=new Statistics();
        Statistics s3=new Statistics(); 
        Statistics s4=new Statistics();
        Statistics s5=new Statistics();
        Statistics s6=new Statistics();//创建对象昂
        System.out.println("已经创建的对象个数为："+Statistics.getNum());
    }

}