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单选题
class Bird { static void talk() { System.out.print("chirp "); } } class Parrot extends Bird { static void talk() { System.out.print("hello "); } public static void main(String [] args) { Bird [] birds = {new Bird(), new Parrot()}; for( Bird b : birds) b.talk(); } } 结果为:()
A
chirp chirp
B
chirp hello
C
hello hello
D
编译失败
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更多 “单选题class Bird { static void talk() { System.out.print("chirp "); } } class Parrot extends Bird { static void talk() { System.out.print("hello "); } public static void main(String [] args) { Bird [] birds = {new Bird(), new Parrot()}; for( Bird b : birds) b.talk(); } } 结果为:()A chirp chirpB chirp helloC hello helloD 编译失败” 相关考题
考题
classBird{staticvoidtalk(){System.out.print(chirp);}}classParrotextendsBird{staticvoidtalk(){System.out.print(hello);}publicstaticvoidmain(String[]args){Bird[]birds={newBird(),newParrot()};for(Birdb:birds)b.talk();}}结果为:()A.chirpchirpB.chirphelloC.hellohelloD.编译失败
考题
现有:classBird{voidtalk(){System.out.print(chirp);}}classParrot2extendsBird{protectedvoidtalk(){System.out.print(hello);publicstaticvoidmain(String[]args){Bird[]birds={newBird(),newParrot2()};for(Birdb:birds)b.talk();}}结果是什么?()A.chirpchirpB.hellohelloC.chirphelloD.编译错误
考题
执行下面程序后输出的正确结果是( )。 public class Test{ public static void main(String args[]){ System.out.print(100%3); System.out.print(","); System.out.print(100%0); } }A.1,1B.1,1.0C.1.0, lD.1.0,1.0
考题
下列程序的输出结果是 ( ) class Derao { void test() { Systeme.out.print("NO");} void test (int i) {System.out.print(a);} void test(int a,int b) {System.out.print(a+b);} } class Test { public static void main(String args[]) { Demo de=new Demo(); de.test(); de.test5.; de.test(6,8); } }A.No568B.568NoC.No514D.86No5
考题
以下程序调试结果为:class Base{Base(){int i = 100;System.out.print (i);}}public class Pri extends Base{static int i = 200;public static void main(String argv[]){Pri p = new Pri();System.out.print(i);}}
A.编译错误B.200C.100200D.100
考题
class One { public One() { System.out.print(1); } } class Two extends One { public Two() { System.out.print(2); } } class Three extends Two { public Three() { System.out.print(3); } } public class Numbers{ public static void main( String[] argv) { new Three(); } } What is the result when this code is executed?() A、 1B、 3C、 123D、 321E、 The code rims with no output.
考题
class BitStuff { BitStuff go() { System.out.print("bits "); return this; } } class MoreBits extends BitStuff { MoreBits go() { System.out.print("more "); return this; } public static void main(String [] args) { BitStuff [] bs = {new BitStuff(), new MoreBits()}; for( BitStuff b : bs) b.go(); } } 结果为:() A、bits bitsB、bits moreC、more moreD、编译失败
考题
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?() A、 foofoofoofoofooB、 foobarfoobarbarC、 foobarfoofoofooD、 foobarfoobarfooE、 barbarbarbarbarF、 foofoofoobarbarG、 foofoofoobarfoo
考题
class Flibitz { public static void main(String [] args) { int grop = 7; new Flibitz().go(grop); System.out.print(grop); } void go(int grop) { if(++grop 〉 7) grop++; System.out.print(grop); } } 结果为:() A、77B、79C、97D、99
考题
现有: class Bird { void talk() { System.out.print("chirp "); } } class Parrot2 extends Bird { protected void talk() { System.out.print("hello "); public static void main(String [] args) { Bird [] birds = {new Bird(), new Parrot2 () }; for( Bird b : birds) b.talk () ; } } 结果是什么 ?() A、 chirp chirpB、 hello helloC、 chirp helloD、编译错误
考题
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“C”); } finally { System.out.print(“B”); } System.out.print(“D”); } public static void badMethod() { throw new Error(); } } What is the result?() A、 ABCDB、 Compilation fails.C、 C is printed before exiting with an error message.D、 BC is printed before exiting with an error message.E、 BCD is printed before exiting with an error message.
考题
class Bird { static void talk() { System.out.print("chirp "); } } class Parrot extends Bird { static void talk() { System.out.print("hello "); } public static void main(String [] args) { Bird [] birds = {new Bird(), new Parrot()}; for( Bird b : birds) b.talk(); } } 结果为:() A、chirp chirpB、chirp helloC、hello helloD、编译失败
考题
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“B”); } finally { System.out.print(“C”); } System.out.print(“D”); } public static void badMethod() {} } What is the result?() A、 ACB、 BDC、 ACDD、 ABCDE、 Compilation fails.
考题
class Passer { static final int x = 5; public static void main(String [] args) { new Passer().go(x); System.out.print(x); } void go(int x) { System.out.print(++x); } } 结果是什么?() A、55B、56C、65D、66
考题
public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (RuntimeException ex) { System.out.print(“B”); } catch (Exception ex1) { System.out.print(“C”); } finally { System.out.print(“D”); } System.out.print(“E”); } public static void badMethod() { throw new RuntimeException(); } } What is the result?() A、 BDB、 BCDC、 BDED、 BCDEE、 ABCDEF、 Compilation fails.
考题
单选题public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (RuntimeException ex) { System.out.print(“B”); } catch (Exception ex1) { System.out.print(“C”); } finally { System.out.print(“D”); } System.out.print(“E”); } public static void badMethod() { throw new RuntimeException(); } } What is the result?()A
BDB
BCDC
BDED
BCDEE
ABCDEF
Compilation fails.
考题
单选题class One { public One() { System.out.print(1); } } class Two extends One { public Two() { System.out.print(2); } } class Three extends Two { public Three() { System.out.print(3); } } public class Numbers{ public static void main( String[] argv) { new Three(); } } What is the result when this code is executed?()A
1B
3C
123D
321E
The code rims with no output.
考题
单选题class Number { public static void main(String [] args) { try { System.out.print(Integer.parseInt("forty ")); } catch (RuntimeException r) { System.out.print("runtime "); } catch (NumberFormatException e) { System.out.print("number "); } } } 结果是什么?()A
fortyB
numberC
runtimeD
编译失败
考题
单选题public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“B”); } finally { System.out.print(“C”); } System.out.print(“D”); } public static void badMethod() { throw new RuntimeException(); } } What is the result? ()A
ABB
BCC
ABCD
BCDE
Compilation fails.
考题
单选题现有: class Bird { void talk() { System.out.print("chirp "); } } class Parrot2 extends Bird { protected void talk() { System.out.print("hello "); public static void main(String [] args) { Bird [] birds = {new Bird(), new Parrot2 () }; for( Bird b : birds) b.talk () ; } } 结果是什么 ?()A
chirp chirpB
hello helloC
chirp helloD
编译错误
考题
单选题class Flibitz { public static void main(String [] args) { int grop = 7; new Flibitz().go(grop); System.out.print(grop); } void go(int grop) { if(++grop 〉 7) grop++; System.out.print(grop); } } 结果为:()A
77B
79C
97D
99
考题
多选题class Flow { public static void main(String [] args) { try { System.out.print("before "); doRiskyThing(); System.out.print("after "); } catch (Exception fe) { System.out.print("catch "); } System.out.println("done "); } public static void doRiskyThing() throws Exception { // this code returns unless it throws an Exception } } 可能会产生下面哪两项结果?()AbeforeBbefore catchCbefore after doneDbefore catch done
考题
单选题class Passer { static final int x = 5; public static void main(String [] args) { new Passer().go(x); System.out.print(x); } void go(int x) { System.out.print(++x); } } 结果是什么?()A
55B
56C
65D
66
考题
单选题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?()A
foofoofoofoofooB
foobarfoobarbarC
foobarfoofoofooD
foobarfoobarfooE
barbarbarbarbarF
foofoofoobarbarG
foofoofoobarfoo
考题
单选题public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“C”); } finally { System.out.print(“B”); } System.out.print(“D”); } public static void badMethod() { throw new Error(); } } What is the result?()A
ABCDB
Compilation fails.C
C is printed before exiting with an error message.D
BC is printed before exiting with an error message.E
BCD is printed before exiting with an error message.
考题
单选题public class X { public static void main(String [] args) { try { badMethod(); System.out.print(“A”); } catch (Exception ex) { System.out.print(“B”); } finally { System.out.print(“C”); } System.out.print(“D”); } public static void badMethod() {} } What is the result?()A
ACB
BDC
ACDD
ABCDE
Compilation fails.
考题
单选题下列程序的运行结果是( )。class Shape{ public Shape(){ System.out.print("Shape"); }}class Circle extends Shape{ public Circle(){ System.out.print("Circle"); }}public class Test{ public static void main(String[]args){ Shape d=new Circle(); }}A
ShapeB
CircleC
ShapeCircleD
程序有错误
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