45 lines
883 B
Java
45 lines
883 B
Java
package p;
|
|
|
|
class Animal {
|
|
}
|
|
|
|
class Cat extends Animal {
|
|
}
|
|
|
|
class Dog extends Animal {
|
|
}
|
|
|
|
class CheckCastTest {
|
|
public static boolean test() {
|
|
Dog d = new Dog();
|
|
Cat c = new Cat();
|
|
Animal da = d;
|
|
Animal ca = c;
|
|
Cat cc = (Cat)da;
|
|
//Cat cc = (Cat)ca;
|
|
return cc instanceof Cat;
|
|
}
|
|
|
|
public static boolean arrayTest() {
|
|
Dog[][] d = new Dog[1][1];
|
|
Cat[][] c = new Cat[1][1];
|
|
Animal[][] da = d;
|
|
Animal[][] ca = c;
|
|
//Cat[][] cc = (Cat[][])da;
|
|
Cat[][] cc = (Cat[][])ca;
|
|
return cc instanceof Cat[][];
|
|
}
|
|
|
|
public static boolean arrayTest2() {
|
|
Cat[] c = new Cat[1];
|
|
c[0] = new Cat();
|
|
return c instanceof Cat[];
|
|
}
|
|
|
|
public static void main() {
|
|
//test();
|
|
arrayTest2();
|
|
//System.out.println(arrayTest());
|
|
}
|
|
}
|