摘要:
class Mammal{}class Dog extends Mammal {}class Cat extends Mammal{}public class TestCast{ public static void main(String[] args) { Mammal m; Dog d=new 阅读全文
摘要:
SquareInt.java源代码及运行结果: package manage; public class SquareInt{ public static void main(String[] args) { int result; for(int x=1;x<10;x++) { result=sq 阅读全文