otherclass.java

来自「东软的java初级教程」· Java 代码 · 共 33 行

class Person {
           public int id;
           public static int total = 0;
           public Person() {
 	         total++;
 	         id = total;
           }
 }

public class OtherClass {
            public static void main(String args[]) {
 	         Person.total = 100;  // 不用创建对象就可以访问静态成员
	         System.out.println(Person.total);
	         
	         
	         Person c = new Person(); 
		 System.out.println(c.total);
		 Person e=new Person();
		 System.out.println(e.total);
		 
		 
		 /*c.id=10;
		 Person d = new Person();
		 d.id=20;
		 System.out.println("c.id="+c.id+"   d.id="+d.id);//对象c和d各自拥有自己的id属性
		 
		 d.id=30;
		 System.out.println("after change d.id to 30, c.id="+c.id+"  d.id="+d.id);
		 */
		 
		 
            }
}