public static void main(String[] args) {
// TODO: 给Person类增加一个静态字段count和静态方法getCount,统计实例的个数
Person p1 = new Person("小明");
System.out.println(Person.getCount()); // 1
Person p2 = new Person("小红");
System.out.println(Person.getCount()); // 2
Person p3 = new Person("小军");
System.out.println(Person.getCount()); // 3
}
public class Person {
public static int Count;
public static Person(){
Count ++;
public static int getCount(){
return Count;
}// TODO
String name;
public Person(String name) {
this.name = name;
“count++”写错地方了。。构造器哪有用“static”修饰的
Sign in to make a reply
呱呱
public static void main(String[] args) {
// TODO: 给Person类增加一个静态字段count和静态方法getCount,统计实例的个数
Person p1 = new Person("小明");
System.out.println(Person.getCount()); // 1
Person p2 = new Person("小红");
System.out.println(Person.getCount()); // 2
Person p3 = new Person("小军");
System.out.println(Person.getCount()); // 3
}
}
public class Person {
public static int Count;
public static Person(){
Count ++;
}
public static int getCount(){
return Count;
}// TODO
String name;
public Person(String name) {
this.name = name;
}
}