snootchy 420 third second first
snootchy 420 first second third
first second third snootchy 420
third second first siiootchy 420
third first second snootchy 420
first second first third snootchy 420
第1题:
A.编译错误
B.200
C.100200
D.100
第2题:
public class Pet{ private String name; public Pet(String name){ this.name = name; } public void speak(){ System.out.print(name); } } public class Dog extends Pet{ public Dog(String name){ super(name); } public void speak(){ super.speak(); System.out.print(“ Dog ”); } } 执行代码 Pet pet = new Dog(“京巴”); pet.speak(); 后输出的内容是哪项?()
第3题:
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(){ System.out.print(4); } public Dog(String name){ super(name); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
第4题:
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(String name){ //这里隐藏了一句代码:super.pet(); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
第5题:
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(){ System.out.print(4); } public Dog(String name){ //这里隐藏了一句代码:super.pet(); this(); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
第6题:
class Beverage { Beverage() { System.out.print("beverage "); } } class Beer extends Beverage { public static void main(String [] args) { Beer b = new Beer(14); } public int Beer(int x) { this(); System.out.print("beer1 "); } public Beer() { System.out.print("beer2 "); } } 结果是什么?()
第7题:
public class TestApp{ public static void main(String[] args){ try{ int i = 0; int j = 1 / i; String myname=null; if(myname.length()>2) System.out.print(“1”); }catch(NullPointerException e){ System.out.print(“2”); } catch(Exception e){ System.out.print(“3”); } } } 上述程序运行后的输出是哪项?()
第8题:
23
13
123
321
第9题:
beerl beverage
beer2 beverage
beverage beer2 beerl
编译失败
第10题:
420 is the output.
An exception is thrown at runtime.
All constructors must be declared public.
Constructors CANNOT use the private modifier.
Constructors CANNOT use the protected modifier.
第11题:
3
2
231
32
第12题:
beer1 beverage
beer2 beverage
beverage beer1
编译失败
第13题:
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(String name){ System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
第14题:
public class Base { public static final String FOO = “foo”; public static void main(String[] args) { Base b = new Base(); Sub s = new Sub(); System.out.print(Base.FOO); System.out.print(Sub.FOO); System.out.print(b.FOO); System.out.print(s.FOO); System.out.print(((Base)s).FOO); } } class Sub extends Base {public static final String FOO=bar;} What is the result?()
第15题:
public class Bootchy { int bootch; String snootch; public Bootchy() { this(”snootchy”); System.out.print(”first “); } public Bootchy(String snootch) { this(420, “snootchy”); System.out.print(”second “); } public Bootchy(int bootch, String snootch) { this.bootch = bootch; this.snootch = snootch; System.out.print(”third “); } public static void main(String[] args) { Bootchy b = new Bootchy(); System.out.print(b.snootch +“ “ + b.bootch); } } What is the result?()
第16题:
Public class Holt extends Thread{ Private String sThreadName; Public static void main(String argv[]) { Holt h=new Holt(); h.go(); Holt(){}; Holt(String s){ sThreadName=s; Public String getThreadName() { return sThreadName;} } Public void go(){ Hot first=new Hot("first"); first.start(); Hot second=new Hot("second"); second.start(); } Public void start() { For(int i=0;i<2;i++) { System.out.print(getThreadName()+i); Try{ Thread.sleep(100); }catch(Exception e){ System.out.print(e.getMessage()) ; } } } } 当编译运行上面代码时,将会出现()
第17题:
class ClassA { public int numberOfinstances; protected ClassA(int numberOfinstances) { this.numberOflnstances = numberOfinstances; } } public class ExtendedA extends ClassA { private ExtendedA(int numberOfinstances) { super(numberOflnstances); } public static void main(String[] args) { ExtendedA ext = new ExtendedA(420); System.out.print(ext.numberOflnstances); } } Which is true?()
第18题:
public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(){ System.out.print(4); } public Dog(String name){ this(); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()
第19题:
33
13
23
123
第20题:
编译时错误
输出first0,second0,first0,second1
输出first0,first1,second10,second1
运行时错误
第21题:
143
423
243
1134
第22题:
snootchy 420 third second first
snootchy 420 first second third
first second third snootchy 420
third second first siiootchy 420
third first second snootchy 420
first second first third snootchy 420
第23题:
23
1 3
123
321
第24题:
foofoofoofoofoo
foobarfoobarbar
foobarfoofoofoo
foobarfoobarfoo
barbarbarbarbar
foofoofoobarbar
foofoofoobarfoo