单选题String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? ()AabcdBABCDCdccdDdcbaECompilation fails.FAn exception is thrown at runtime.

题目
单选题
String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? ()
A

 abcd

B

 ABCD

C

 dccd

D

 dcba

E

 Compilation fails.

F

 An exception is thrown at runtime.


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更多“单选题String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? ()A  abcdB  ABCDC  dccdD  dcbaE  Compilation fails.F  An exception is thrown at runtime.”相关问题
  • 第1题:

    public static void main(String[] args) {  String str = “null‟;  if (str == null) {  System.out.println(”null”);  } else (str.length() == 0) {  System.out.println(”zero”);  } else {  System.out.println(”some”);  }  }  What is the result?()

    • A、 null
    • B、 zero
    • C、 some
    • D、 Compilation fails.
    • E、 An exception is thrown at runtime.

    正确答案:D

  • 第2题:

    public static void main(String[] args) {  for (int i=0;i<= 10;i++){  if( i>6) break;  }  System.out.println(i);  }  What is the result?() 

    • A、 6
    • B、 7
    • C、 10
    • D、 11
    • E、 Compilation fails.
    • F、 An exception is thrown at runtime.

    正确答案:E

  • 第3题:

    public class Test {  public static void main(String[] args) {  String str = NULL;  System.out.println(str);  }  }   What is the result?()  

    • A、 NULL
    • B、 Compilation fails.
    • C、 The code runs with no output.
    • D、 An exception is thrown at runtime.

    正确答案:B

  • 第4题:

    public class Foo {  public static void main(String[] args) {  try {  return;  } finally {  System.out.println( “Finally” );  }  }  }  What is the result?()

    • A、 Finally
    • B、 Compilation fails.
    • C、 The code runs with no output.
    • D、 An exception is thrown at runtime.

    正确答案:A

  • 第5题:

    interface Beta {}  class Alpha implements Beta {  String testIt() {  return “Tested”;  }  }  public class Main1 {  static Beta getIt() {  return new Alpha();  }  public static void main( String[] args ) {  Beta b = getIt();  System.out.println( b.testIt() );  }  }  What is the result?()  

    • A、 Tested
    • B、 Compilation fails.
    • C、 The code runs with no output.
    • D、 An exception is thrown at runtime.

    正确答案:B

  • 第6题:

    单选题
    public class TestString 1 {  public static void main(String[] args) {  String str = “420”;  str += 42;  System.out.print(str);  }  }  What is the output?()
    A

     42

    B

     420

    C

     462

    D

     42042

    E

     Compilation fails.

    F

     An exception is thrown at runtime.


    正确答案: A
    解析: 暂无解析

  • 第7题:

    单选题
    public class Test {  public static void main( String[] args) {  String foo = args[1];  String bar = args[2];  String baz = args[3];  System.out.println(“baz = “ + baz); }  }   And the command line invocation: java Test red green blue   What is the result?()
    A

     baz =

    B

     baz = null

    C

     baz = blue

    D

     Compilation fails.

    E

     An exception is thrown at runtime.


    正确答案: C
    解析: A java.lang.ArrayIndexOutOfBoundsException is thrown because of line 3, should be args[0].

  • 第8题:

    单选题
    class TestA {  public void start() { System.out.println(”TestA”); }  }  public class TestB extends TestA {  public void start() { System.out.println(”TestB”); } public static void main(String[] args) {  ((TestA)new TestB()).start();  }  }  What is the result?()
    A

     TestA

    B

     TestB

    C

     Compilation fails.

    D

     An exception is thrown at runtime.


    正确答案: C
    解析: 暂无解析

  • 第9题:

    单选题
    public class Foo {  public static void main(String[] args) {  try {  return;  } finally {  System.out.println( “Finally” );  }  }  }  What is the result?()
    A

     Finally

    B

     Compilation fails.

    C

     The code runs with no output.

    D

     An exception is thrown at runtime.


    正确答案: B
    解析: 暂无解析

  • 第10题:

    单选题
    Given: What is the result?()
    A

    Afoo Afoo

    B

    Afoo Bfoo

    C

    Bfoo Afoo

    D

    Bfoo Bfoo

    E

    Compilation fails.

    F

    An exception is thrown at runtime.


    正确答案: D
    解析: 暂无解析

  • 第11题:

    单选题
    public class Test {  public static void main(String[] args) {  String str = NULL;  System.out.println(str);  }  }   What is the result?()
    A

     NULL

    B

     Compilation fails.

    C

     The code runs with no output.

    D

     An exception is thrown at runtime.


    正确答案: C
    解析: NULL should be "null".

  • 第12题:

    单选题
    What is the result?()
    A

    1

    B

    12

    C

    14

    D

    123

    E

    Compilation fails.

    F

    An exception is thrown at runtime.


    正确答案: B
    解析: 暂无解析

  • 第13题:

    String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? () 

    • A、 abcd
    • B、 ABCD
    • C、 dccd
    • D、 dcba
    • E、 Compilation fails.
    • F、 An exception is thrown at runtime.

    正确答案:A

  • 第14题:

    class TestA {  public void start() { System.out.println(”TestA”); }  }  public class TestB extends TestA {  public void start() { System.out.println(”TestB”); } public static void main(String[] args) {  ((TestA)new TestB()).start();  }  }  What is the result?() 

    • A、 TestA
    • B、 TestB
    • C、 Compilation fails.
    • D、 An exception is thrown at runtime.

    正确答案:B

  • 第15题:

    public class Test {  public static void main( String[] args) {  String foo = args[1];  String bar = args[2];  String baz = args[3];  System.out.println(“baz = “ + baz); }  }   And the command line invocation: java Test red green blue   What is the result?()  

    • A、 baz =
    • B、 baz = null
    • C、 baz = blue
    • D、 Compilation fails.
    • E、 An exception is thrown at runtime.

    正确答案:E

  • 第16题:

    11. String test = “This is a test”;  12. String[] tokens = test.split(”/s”);  13. System.out.println(tokens.length);  What is the result?() 

    • A、 0
    • B、 1
    • C、 4
    • D、 Compilation fails.
    • E、 An exception is thrown at runtime.

    正确答案:D

  • 第17题:

    String a = null;  a.concat(“abc”);  a.concat(“def”);  System.out.println(a);   What is the result?()  

    • A、 abc
    • B、 null
    • C、 abcdef
    • D、 Compilation fails.
    • E、 The code runs with no output.
    • F、 An exception is thrown at runtime.

    正确答案:F

  • 第18题:

    单选题
    String a = null;  a.concat(“abc”);  a.concat(“def”);  System.out.println(a);   What is the result?()
    A

     abc

    B

     null

    C

     abcdef

    D

     Compilation fails.

    E

     The code runs with no output.

    F

     An exception is thrown at runtime.


    正确答案: D
    解析: Exception in thread "main" java.lang.NullPointerException at X.main(X.java:12) 

  • 第19题:

    单选题
    String a = “ABCD”;  String b = a.toLowerCase();  b.replace(‘a’, ‘d’);  b.replace(‘b’, ‘c’);  System.out.println(b);   What is the result? ()
    A

     abcd

    B

     ABCD

    C

     dccd

    D

     dcba

    E

     Compilation fails.

    F

     An exception is thrown at runtime.


    正确答案: F
    解析: 暂无解析

  • 第20题:

    单选题
    public static void main(String[] args) {  String str = “null‟;  if (str == null) {  System.out.println(”null”);  } else (str.length() == 0) {  System.out.println(”zero”);  } else {  System.out.println(”some”);  }  }  What is the result?()
    A

     null

    B

     zero

    C

     some

    D

     Compilation fails.

    E

     An exception is thrown at runtime.


    正确答案: C
    解析: 暂无解析

  • 第21题:

    单选题
    public static void main(String[] args) {  for (int i=0;i6) break;  }  System.out.println(i);  }  What is the result?()
    A

     6

    B

     7

    C

     10

    D

     11

    E

     Compilation fails.

    F

     An exception is thrown at runtime.


    正确答案: A
    解析: 暂无解析

  • 第22题:

    单选题
    11. String test = “This is a test”;  12. String[] tokens = test.split(”/s”);  13. System.out.println(tokens.length);  What is the result?()
    A

     0

    B

     1

    C

     4

    D

     Compilation fails.

    E

     An exception is thrown at runtime.


    正确答案: C
    解析: 暂无解析

  • 第23题:

    单选题
    11. String test= “a1b2c3”;  12. String[] tokens = test.split(”//d”);  13. for(String s: tokens) System.out.print(s +“ “);  What is the result?()
    A

     a b c

    B

     1 2 3

    C

     a1b2c3

    D

     a1 b2 c3

    E

     Compilation fails.

    F

     The code runs with no output.

    G

     An exception is thrown at runtime.


    正确答案: B
    解析: 暂无解析

  • 第24题:

    ( 难度:中等)给出如下代码片段,运行结果为( ):
    String a = “ABCD”;
    String b = a.toLowerCase();
    b.replace(‘a’, ‘d’);
    b.replace(‘b’, ‘c’);
    System.out.println;
    A.abcd
    B.ABCD
    C.dccd
    D.dcba

    答案:A