网友您好, 请在下方输入框内输入要搜索的题目:

题目内容 (请给出正确答案)
单选题
1.class TestSuper { 22.TestSuper(int i) { } 3. } 4.class TestSub extends TestSuper{ } 5.class TestAll { 6.public static void main (String [] args) { 7.new TestSub(); 8.} 9.} Which is true?()
A

 Compilation fails.

B

 The code runs without exception.

C

 An exception is thrown at line 7.

D

 An exception is thrown at line 2.


参考答案

参考解析
解析: 暂无解析
更多 “单选题1.class TestSuper { 22.TestSuper(int i) { } 3. } 4.class TestSub extends TestSuper{ } 5.class TestAll { 6.public static void main (String [] args) { 7.new TestSub(); 8.} 9.} Which is true?()A  Compilation fails.B  The code runs without exception.C  An exception is thrown at line 7.D  An exception is thrown at line 2.” 相关考题
考题 classTestSuper{22.TestSuper(inti){}3.}4.classTestSubextendsTestSuper{}5.classTestAll{6.publicstaticvoidmain(String[]args){7.newTestSub();8.}9.}Whichistrue?() A.Compilationfails.B.Thecoderunswithoutexception.C.Anexceptionisthrownatline7.D.Anexceptionisthrownatline2.

考题 class MyThread extends Thread {  public void run() { System.out.println(“AAA”); }  public void run(Runnable r) { System.out.println(“BBB”); }  public static void main(String[] args) {  new Thread(new MyThread()).start();  }  }   What is the result?()  A、 AAAB、 BBBC、 Compilation fails.D、 The code runs with no output.

考题 public class Test {  public static void main(String [] args) {  boolean assert = true;  if(assert) {  System.out.println(”assert is true”);  }  }  } Given:  javac -source 1.3 Test.java  What is the result?() A、 Compilation fails.B、 Compilation succeeds with errors.C、 Compilation succeeds with warnings.D、 Compilation succeeds without warnings or errors.

考题 1.class TestSuper { 22.TestSuper(int i) { } 3. } 4.class TestSub extends TestSuper{ } 5.class TestAll { 6.public static void main (String [] args) { 7.new TestSub(); 8.} 9.} Which is true?()  A、 Compilation fails.B、 The code runs without exception.C、 An exception is thrown at line 7.D、 An exception is thrown at line 2.

考题 public class Alpha{  private static Character() ids;  public static void main( String[] args){  ids = new Character[args.length];  for (int i=0; iids[i] = new Character( args[i] );  System.out.print( ids[i] );  }  }  }   What is correct?()   A、 Compilation fails.B、 The code runs with no output.C、 An exception is thrown at runtime.D、 The code runs, outputing a concatenated list of the arguments passed to the program.

考题 1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()A、 The program runs and prints “0”B、 The program runs and prints “1”C、 The program runs but aborts with an exception.D、 An error “possible undefined variable” at line 4 causes compilation to fail.E、 An error “possible undefined variable” at line 9 causes compilation to fail.

考题 public class Alpha{  public static void main( string[] args ){  if ( args.length == 2 ) {  if ( args.[0].equalsIgnoreCase(“-b”) )  System.out.println( new Boolean( args[1] ));  }  }  }   And the code is invoked by using the command: java Alpha –b TRUE   What is the result?()  A、 trueB、 nullC、 falseD、 Compilation fails.E、 The code runs with no output.F、 An exception is thrown at runtime.

考题 1. public class ForBar  {  2. public static void main(String []args)   {  3.   int i = 0, j = 5;  4. tp: for (;;)  {  5. i ++;  6. for(;;)  7. if(i  --j) break tp;  8. }  9. system.out.printIn(“i = ” + i + “, j = “+ j);  10. }  11. }   What is the result?()  A、 The program runs and prints “i=1, j=0”B、 The program runs and prints “i=1, j=4”C、 The program runs and prints “i=3, j=4”D、 The program runs and prints “i=3, j=0”E、 An error at line 4 causes compilation to fail.F、 An error at line 7 causes compilation to fail.

考题 class Super {  public int i = 0;  public Super(String text) {  i = 1; }  }  public class Sub extends Super {  public Sub(String text) {  i = 2;  }   public static void main(String args[]) {  Sub sub = new Sub(“Hello”);  System.out.println(sub.i);  }  }  What is the result?()  A、 0B、 1C、 2D、 Compilation fails.

考题 1. class Pizza {  2. java.util.ArrayList toppings;  3. public final void addTopping(String topping) {  4. toppings.add(topping); 5. }  6. }  7. public class PepperoniPizza extends Pizza {  8. public void addTopping(String topping) {  9. System.out.println(”Cannot add Toppings”);  10. }  11. public static void main(String[] args) {  12. Pizza pizza = new PepperoniPizza();  13. pizza.addTopping(”Mushrooms”);  14. }  15. }  What is the result?() A、 Compilation fails.B、 Cannot add ToppingsC、 The code runs with no output.D、 A NullPointerException is thrown in Line 4.

考题 public class Alpha1 {  public static void main( String[] args ) {  boolean flag; int i=0;  do {  flag = false;  System.out.println( i++ );  flag = i  10;  continue;  } while ( (flag)? true:false );  }  }  What is the result?()  A、 000000000B、 0123456789C、 Compilation fails.D、 The code runs with no output.E、 The code enters an infinite loop.F、 An exception is thrown at runtime.

考题 Which code fragments will succeed in printing the last argument given on the command line to the standard output, and exit gracefully with no output if no arguments are given?()   CODE FRAGMENT a:   public static void main(String args[]) {   if (args.length != 0)   System.out.println(args[args.length-1]);   }   CODE FRAGMENT b:   public static void main(String args[]) {   try { System.out.println(args[args.length]); }   catch (ArrayIndexOutOfBoundsException e) {}   }   CODE FRAGMENT c:   public static void main(String args[]) {   int ix = args.length;   String last = args[ix];   if (ix != 0) System.out.println(last);   }   CODE FRAGMENT d:   public static void main(String args[]) {   int ix = args.length-1;   if (ix  0) System.out.println(args[ix]);   }   CODE FRAGMENT e:   public static void main(String args[]) {   try { System.out.println(args[args.length-1]);  }catch (NullPointerException e) {}   }  A、Code fragment a.B、Code fragment b.C、Code fragment c.D、Code fragment d.E、Code fragment e.

考题 1. public class test (  2. public static void main(string args[]) {  3. int 1= 0;  4. while (i)  {  5. if (i==4) {  6. break;  7. }  8. ++i;  9. }  10.    11. }  12. )   What is the value of i at line 10?()A、 0B、 3C、 4D、 5E、 The code will not compile.

考题 class Base {  Base() { System.out.print(“Base”); }  }  public class Alpha extends Base {  public static void main( String[] args ) {  new Alpha();  new Base();  }  }  What is the result?()  A、 BaseB、 BaseBaseC、 Compilation fails.D、 The code runs with no output.E、 An exception is thrown at runtime.

考题 class super (   public int I = 0;   public super (string text) (   I = 1   )   )     public class sub extends super (   public sub (string text) (   i= 2   )   public static void main (straing args) (  sub sub = new sub (“Hello”);   system.out. PrintIn(sub.i);  )   )   What is the result?()A、 Compilation will fail.B、 Compilation will succeed and the program will print “0”C、 Compilation will succeed and the program will print “1”D、 Compilation will succeed and the program will print “2”

考题 单选题1. public class X {  2. public static void main (String[]args)   {  3. int [] a = new int [1]  4. modify(a);  5. System.out.printIn(a[0]);  6. }  7.    8. public static void modify (int[] a)  {  9.   a[0] ++;  10.    } 11. }       What is the result?()A  The program runs and prints “0”B  The program runs and prints “1”C  The program runs but aborts with an exception.D  An error “possible undefined variable” at line 4 causes compilation to fail.E  An error “possible undefined variable” at line 9 causes compilation to fail.

考题 单选题class MyThread extends Thread {  public void run() { System.out.println(“AAA”); }  public void run(Runnable r) { System.out.println(“BBB”); }  public static void main(String[] args) {  new Thread(new MyThread()).start();  }  }   What is the result?()A  AAAB  BBBC  Compilation fails.D  The code runs with no output.

考题 单选题public class Alpha{  private static Character() ids;  public static void main( String[] args){  ids = new Character[args.length];  for (int i=0; iids[i] = new Character( args[i] );  System.out.print( ids[i] );  }  }  }   What is correct?()A  Compilation fails.B  The code runs with no output.C  An exception is thrown at runtime.D  The code runs, outputing a concatenated list of the arguments passed to the program.

考题 单选题class super (  public int I = 0;  public super (string text) (  I = 1  )  )  public class sub extends super (  public sub (string text)   ( i= 2  )  public static void main (straing args[])   (  sub sub = new sub (“Hello”);  system.out. PrintIn(sub.i);  )    )   What is the result?()A  Compilation will fail.B  Compilation will succeed and the program will print “0”C  Compilation will succeed and the program will print “1”D  Compilation will succeed and the program will print “2”

考题 单选题class Base {  Base() { System.out.print(“Base”); }  }  public class Alpha extends Base {  public static void main( String[] args ) {  new Alpha();  new Base();  }  }  What is the result?()A  BaseB  BaseBaseC  Compilation fails.D  The code runs with no output.E  An exception is thrown at runtime.

考题 单选题1. public class ForBar  {  2. public static void main(String []args)   {  3.   int i = 0, j = 5;  4. tp: for (;;)  {  5. i ++;  6. for(;;)  7. if(i  --j) break tp;  8. }  9. system.out.printIn(“i = ” + i + “, j = “+ j);  10. }  11. }   What is the result?()A  The program runs and prints “i=1, j=0”B  The program runs and prints “i=1, j=4”C  The program runs and prints “i=3, j=4”D  The program runs and prints “i=3, j=0”E  An error at line 4 causes compilation to fail.F  An error at line 7 causes compilation to fail.

考题 单选题1. class Pizza {  2. java.util.ArrayList toppings;  3. public final void addTopping(String topping) {  4. toppings.add(topping); 5. }  6. }  7. public class PepperoniPizza extends Pizza {  8. public void addTopping(String topping) {  9. System.out.println(”Cannot add Toppings”);  10. }  11. public static void main(String[] args) {  12. Pizza pizza = new PepperoniPizza();  13. pizza.addTopping(”Mushrooms”);  14. }  15. }  What is the result?()A  Compilation fails.B  Cannot add ToppingsC  The code runs with no output.D  A NullPointerException is thrown in Line 4.

考题 单选题Which code fragments will succeed in printing the last argument given on the command line to the standard output, and exit gracefully with no output if no arguments are given?()   CODE FRAGMENT a:   public static void main(String args[]) {   if (args.length != 0)   System.out.println(args[args.length-1]);   }   CODE FRAGMENT b:   public static void main(String args[]) {   try { System.out.println(args[args.length]); }   catch (ArrayIndexOutOfBoundsException e) {}   }   CODE FRAGMENT c:   public static void main(String args[]) {   int ix = args.length;   String last = args[ix];   if (ix != 0) System.out.println(last);   }   CODE FRAGMENT d:   public static void main(String args[]) {   int ix = args.length-1;   if (ix  0) System.out.println(args[ix]);   }   CODE FRAGMENT e:   public static void main(String args[]) {   try { System.out.println(args[args.length-1]);  }catch (NullPointerException e) {}   }A Code fragment a.B Code fragment b.C Code fragment c.D Code fragment d.E Code fragment e.

考题 单选题public class Test {  public static void main(String [] args) {  boolean assert = true;  if(assert) {  System.out.println(”assert is true”);  }  }  } Given:  javac -source 1.3 Test.java  What is the result?()A  Compilation fails.B  Compilation succeeds with errors.C  Compilation succeeds with warnings.D  Compilation succeeds without warnings or errors.

考题 单选题public class Alpha{  public static void main( string[] args ){  if ( args.length == 2 ) {  if ( args.[0].equalsIgnoreCase(“-b”) )  System.out.println( new Boolean( args[1] ));  }  }  }   And the code is invoked by using the command: java Alpha –b TRUE   What is the result?()A  trueB  nullC  falseD  Compilation fails.E  The code runs with no output.F  An exception is thrown at runtime.

考题 单选题Consider the following class:     class Test(int i) {     void test(int i) {  System.out.println(“I am an int.”); }    void test(String s) {   System.out.println(“I am a string.”);     }          public static void main(String args) {    Test t=new Test();     char ch=“y”;    t.test(ch);     }      }     Which of the statements below is true?()A  Line 5 will not compile, because void methods cannot be overridden.B  Line 12 will not compile, because there is no version of test() that rakes a charargument.C  The code will compile but will throw an exception at line 12.D  The code will compile and produce the following output: I am an int.E  The code will compile and produce the following output: I am a String.

考题 单选题public class Alpha1 {  public static void main( String[] args ) {  boolean flag; int i=0;  do {  flag = false;  System.out.println( i++ );  flag = i  10;  continue;  } while ( (flag)? true:false );  }  }  What is the result?()A  000000000B  0123456789C  Compilation fails.D  The code runs with no output.E  The code enters an infinite loop.F  An exception is thrown at runtime.