doX();
X.doX();
x.X.doX();
x.X myX = new x.X(); myX.doX();
第1题:
A. 输出:value is 99.99
B. 输出: value is 9
C. 输出: value is 9.0
D. 在第4行出现编译错误
第2题:
1. public class A { 2. void A() { 3. System.out.println(“Class A”); 4. } 5. public static void main(String[] args) { 6. new A(); 7. } 8. } What is the result?()
第3题:
现有2个文件:1.packagex;2.publicclassX{3.publicstaticvoiddoX(){System.out.print("doX");}4.}和:1.classFind{2.publicstaticvoidmain(String[]args){3.//insertcodehere4.}5.}哪两行分别插入到类Find的第3行将编译并产生输出doX”?()
A.doX();
B.X.doX();
C.x.X.doX();
D.x.XmyX=newx.X();myX.doX();
第4题:
现有2 个文件: 1. package x; 2. public class X { 3. public static void doX() { System.out.print("doX "); } 4. } 和: 1. class Find { 2. public static void main(String [] args) { 3. //insert code here 4. } 5. } 哪两行分别插入到类Find 的第3 行将编译并产生输出“doX”? ()
第5题:
1. class HorseRadish { 2. // insert code here 3. protected HorseRadish(int x) { 4. System.out.println("bok choy"); 5. } 6. } 7. class Wasabi extends HorseRadish { 8. public static void main(String [] args) { 9. Wasabi w = new Wasabi(); 10. } 11. } 分别插入到第 2 行,哪两项允许代码编译并产生"bok choy" 输出结果?()
第6题:
1. public interface A { 2. public void doSomething(String thing); 3. } 1. public class AImpl implements A { 2. public void doSomething(String msg) { } 3. } 1. public class B { 2. public A doit() { 3. // more code here 4. } 5. 6. public String execute() { 7. // more code here 8. } 9. } 1. public class C extends B { 2. public AImpl doit() { 3. // more code here 4. } 5. 6. public Object execute() { 7. // more code here 8. } 9. } Which statement is true about the classes and interfaces in the exhibit?()
第7题:
现有: 1. class HorseRadish { 2. // insert code here 3. protected HorseRadish(int x) { 4. System.out.println("bok choy"); 5. } 6. } 7. class Wasabi extends HorseRadish { 8. public static void main(String [] args) { 9. Wasabi w = new Wasabi(); 10. } 11. } 分别插入到第 2 行,哪两项允许代码编译并产生"bok choy" 输出结果?()
第8题:
A.doX();
B.X.doX();
C.x.X.doX();
D.x.XmyX=newx.X();myX.doX();
第9题:
现有两个文件:A package x; public class X{ public static void doX(), System.out.print(“doX”); } 和: Import x,X; class Find{ public static void main(String[] args){ X myX =new X(); myX.doX(); X.doX(); x.X. doX(); x.X myX2=new x.x(); myX2.doX(); } } 结果为:()
第10题:
现有: 1. class Book { 2. private final void read() { System.out.print("book "); } 3. } 4. class Page extends Book { 5. public static void main(String [] args) { 6. // insert code here 7. } 8. private final void read() { System.out.print("page "); } 9. } 和如下三个代码片段( x, y, z ): x. // just a comment y. new Page().read(); z. new Book().read(); 分别插入到第6行,有几个允许代码通过编译并可以运行且无异常?()