class A{ public A(){ System.out.println(" String a"); } }class B extends A{public B(){System.out.println("String b");}}class C extends B{public C(){System.out.println("String c");}}public class ConstructorTest{ public static void main(Stringargs[]){C
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 18:57:17
![class A{ public A(){ System.out.println(](/uploads/image/z/14683189-13-9.jpg?t=class+A%7B+public+A%28%29%7B+System.out.println%28%22+String+a%22%29%3B+%7D+%7Dclass+B+extends+A%7Bpublic+B%28%29%7BSystem.out.println%28%22String+b%22%29%3B%7D%7Dclass+C+extends+B%7Bpublic+C%28%29%7BSystem.out.println%28%22String+c%22%29%3B%7D%7Dpublic+class+ConstructorTest%7B+public+static+void+main%28Stringargs%5B%5D%29%7BC)
class A{ public A(){ System.out.println(" String a"); } }class B extends A{public B(){System.out.println("String b");}}class C extends B{public C(){System.out.println("String c");}}public class ConstructorTest{ public static void main(Stringargs[]){C
class A{ public A(){ System.out.println(" String a"); } }
class B extends A{
public B(){
System.out.println("String b");
}
}
class C extends B{
public C(){
System.out.println("String c");
}
}
public class ConstructorTest{
public static void main(Stringargs[]){
C c = new C();
}
}
运行结果是什么?
class A{ public A(){ System.out.println(" String a"); } }class B extends A{public B(){System.out.println("String b");}}class C extends B{public C(){System.out.println("String c");}}public class ConstructorTest{ public static void main(Stringargs[]){C
String aString bString c
子类创建实例的时候要调用父类构造方法