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What will be written to the standard output when the following program is run?()   class Base {  int i;  Base() {   add(1);   }   void add(int v) {  i += v;  }   void print() {  System.out.println(i);  }   }   class Extension extends Base {  Extension() {  add(2);  }   void add(int v) {  i += v*2;  }  }   public class Qd073 {   public static void main(String args[]) {  bogo(new Extension());  }   static void bogo(Base b) {  b.add(8);  b.print();   }   }  

  • A、9
  • B、18
  • C、20
  • D、21
  • E、22

参考答案

更多 “ What will be written to the standard output when the following program is run?()   class Base {  int i;  Base() {   add(1);   }   void add(int v) {  i += v;  }   void print() {  System.out.println(i);  }   }   class Extension extends Base {  Extension() {  add(2);  }   void add(int v) {  i += v*2;  }  }   public class Qd073 {   public static void main(String args[]) {  bogo(new Extension());  }   static void bogo(Base b) {  b.add(8);  b.print();   }   }  A、9B、18C、20D、21E、22” 相关考题
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考题 What will be written to the standard output when the following program is run?()   public class Q8499 {   public static void main(String args[]) {  double d = -2.9;   int i = (int) d;  i *= (int) Math.ceil(d);  i *= (int) Math.abs(d);   System.out.println(i);   }   }A、12B、18C、8D、9E、27

考题 What will be the result of attempting to compile and run the following program?()   public class Q28fd {   public static void main(String args[]) {   int counter = 0;   l1:   for (int i=10; i0; i--) {   l2:  int j = 0;   while (j  10) {   if (j  i) break l2;   if (i == j) {   counter++;   continue l1;   }   }   counter--;   }   System.out.println(counter);  }   }   A、The program will fail to compile.B、The program will not terminate normally.C、The program will write 10 to the standard output.D、The program will write 0 to the standard output.E、The program will write 9 to the standard output.

考题 Given the following code, write a line of code that, when inserted at the indicated location, will make the overriding method in Extension invoke the overridden method in class Base on the current object.   class Base {   public void print( ) {   System.out.println("base");   }   }   class Extention extends Base {   public void print( ) {   System.out.println("extension");   // insert line of implementation here   }   }   public class Q294d {   public static void main(String args[]) {   Extention ext = new Extention( );   ext.print( );   }   }   Fill in a single line of implementation.()

考题 单选题What will be the result of attempting to compile and run the following code?()   public class Q6b0c {   public static void main(String args[]) {  int i = 4;  float f = 4.3;   double d = 1.8;   int c = 0;   if (i == f) c++;   if (((int) (f + d)) == ((int) f + (int) d))  c += 2;   System.out.println(c);   }   }A The code will fail to compile.B 0 will be written to the standard output.C 1 will be written to the standard output.D 2 will be written to the standard output.E 3 will be written to the standard output.

考题 单选题What will be the result of attempting to compile and run the following program?()   public class Q28fd {   public static void main(String args[]) {   int counter = 0;   l1:   for (int i=10; i i) break l2;   if (i == j) {   counter++;   continue l1;   }   }   counter--;   }   System.out.println(counter);  }   }A The program will fail to compile.B The program will not terminate normally.C The program will write 10 to the standard output.D The program will write 0 to the standard output.E The program will write 9 to the standard output.