abstract class Shape
{ abstract void draw();}
C.lass Square extends Shape{ }
A. Square类和Shape类都可以成功编译
B. Square类无法编译,但Shape类可以编译
C. 类无法编译,但Square类可以编译
D. Square类和Shape类都无法编译
[问答题] 以下代码能否编译通过?
[单选题]阅读下面代码 abstract class Person { public Person(String n) { name=n; } public______String getDescription(); public String getName() { return name; } private String name; } 在下画线处应填入的修饰符是A.staticB.abstractC.protectedD.final
[单选题]阅读下列代码段 abstract class Person{ public Person(String n){ name=n; } public______String getDescription(); public String getName(){ } private String name; } 在下画线处应填入的修饰符是A.staticB.abstractC.protectedD.final
[主观题]Java代码查错1.abstract class Name {private String name;public abstract boolean isStupidName(String name) {}}大侠们,这有何错误?
[单选题]编译和执行以下代码,输出结果是( )。 int i=1; switch (i) { case 0: System.out.print("zero,"); break; case 1: System.out.print("one,"); case 2: System.out.print("two,"); default: System.out.println("default"); }A.one,B.one,two,C.one,two,defaultD.default
[主观题]Java代码查错1.abstract class Name {private String name;public abstract boolean isStupidName(String name) {}}大侠们,这有何错误?
[单选题]有如下代码段 public class OperatorAndExceptions { public static void main(String args[ ] { int i=10,j=15; System.out.println(i==j); String s1 = new String("how are you!"); String s2=new String("how are you!"); System.out.println(s1==s2); } } 其输出为( )。A.
[单选题]已知如下代码: public class Test long a[]=new long[10] public static void main (String args[]{ System.out.println(a[6];} 以下( )语句是正确的。A.Output is null.B.When running,some error will occur.C.When compile,some error will occur.D.Output is 0.
[主观题]以下代码的运行结果是______。public class exl5{public static void main(String args []){int i = 5;do{i--;if(i > 2)continue;}while(i < 0);System.out.println(i);}}
[单选题]有如下程序:编译运行程序将出现的情况是( )。