作业

package java第四周学习;



public class jingtai {
	private static int n;
	public jingtai()
	{
	    n++;//1次new n+1
	}
	public static int getnum()
	{
	    return n;//返回n值
	}
	public static void main(String[] args) {
	    // TODO 自动生成的方法存根
	    jingtai t1=new jingtai();
	    jingtai t2=new jingtai();
	    jingtai t3=new jingtai();//创建对象
	    System.out.println("对象个数为："+jingtai.getnum());
	}
	

}