0
1
14
–15
An error at line 3 causes compilation to fail.
An error at line 4 causes compilation to fail.
第1题:
package foo; import java.util.Vector; private class MyVector extends Vector { int i = 1; public MyVector() { i = 2; } } public class MyNewVector extends MyVector { public MyNewVector() { i = 4; } public static void main(String args[]) { MyVector v = new MyNewVector(); } } What is the result?()
第2题:
1.public class test ( 2.public static void main (String args[]) { 3.int i = 0xFFFFFFF1; 4.int j = ~i; 5. 6.} 7.) What is the decimal value of j at line 5?()
第3题:
public class ForBar { public static void main(String args) { int i = 0, j = 5; tp: for (;;) { i ++; for(;;) if(i > --j) break tp; } system.out.printIn(“i = ” + i + “, j = “+ j); } } What is the result? ()
第4题:
2. public class Foo implements Runnable ( 3. public void run (Thread t) { 4. system.out.printIn(“Running.”); 5. } 6. public static void main (String[] args) { 7. new thread (new Foo()).start(); 8. ) 9. ) What is the result?()
第5题:
1.public class Test { 2.public static void main (String args[]) { 3.class Foo { 4.public int i = 3; 5.} 6.Object o = (Object) new Foo(); 7.Foo foo = (Foo)o; 8.System.out.printIn(foo. i); 9. } 10.} What is the result?()
第6题:
Compilation succeeds.
An error at line 2 causes compilation to fail.
An error at line 9 causes compilation to fail.
An error at line 10 causes compilation to fail.
An error at line 11 causes compilation to fail.
第7题:
Compilation succeeds and 4 is printed.
Compilation succeeds and 43 is printed.
An error on line 9 causes compilation to fail.
An error on line 14 causes compilation to fail.
Compilation succeeds but an exception is thrown at line 9.
第8题:
Compilation succeeds.
Compilation fails because of an error at line 5.
Compilation fails because of an error at line 6.
Compilation fails because of an error at line 14.
Compilation fails because of an error at line 17.
第9题:
x = 0
x = 42
Compilation fails because of an error in line 2 of class Test2.
Compilation fails because of an error in line 3 of class Test1.
Compilation fails because of an error in line 4 of class Test2.
第10题:
0
1
14
–15
An error at line 3 causes compilation to fail.
An error at line 4 causes compilation to fail.
第11题:
Compilation will fail.
Compilation will succeed and the program will print “3”
Compilation will succeed but the program will throw a ClassCastException at line 6.
Compilation will succeed but the program will throw a ClassCastException at line 7.
第12题:
The program prints “lava”
The program prints “java”
An error at line 7 causes compilation to fail.
Compilation succeeds but the program throws an exception.
第13题:
1. class A { 2. public String toString () { 3. return “4”; 4. } 5. } 6. class B extends A { 7. public String toString () { 8. return super.toString() + “3”; 9. } 10. } 11. public class Test { 12. public static void main(String[]args) { 13. System.out.printIn(new B()); 14. } 15. } What is the result?()
第14题:
1. interface foo { 2. int k = 0; 3. } 4. 5. public class test implements Foo ( 6. public static void main(String args[]) ( 7. int i; 8. Test test = new test (); 9. i= test.k; 10.i= Test.k; 11.i= Foo.k; 12.) 13.) 14. What is the result?()
第15题:
public class Test { public static void replaceJ(string text) { text.replace (‘j’, ‘l’); } public static void main(String args[]) { string text = new String (“java”) replaceJ(text); system.out.printIn(text); } } What is the result?()
第16题:
1. interface TestA { String toString(); } 2. public class Test { 3. public static void main(String[] args) { 4. System.out.println(new TestA() { 5. public String toString() { return “test”; } 6. } 7. } 8. } What is the result?()
第17题:
interface foo { int k = 0; } public class test implements Foo ( public static void main(String args) ( int i; Test test = new test (); i= test.k; i= Test.k; i= Foo.k; ) ) What is the result? ()
第18题:
The program runs and prints “i=1, j=0”
The program runs and prints “i=1, j=4”
The program runs and prints “i=3, j=4”
The program runs and prints “i=3, j=0”
An error at line 4 causes compilation to fail.
An error at line 7 causes compilation to fail.
第19题:
The program runs and prints “i=1, j=0”
The program runs and prints “i=1, j=4”
The program runs and prints “i=3, j=4”
The program runs and prints “i=3, j=0”
An error at line 4 causes compilation to fail.
An error at line 7 causes compilation to fail.
第20题:
0
1
14
–15
An error at line 3 causes compilation to fail.
An error at line 4 causes compilation to fail.
第21题:
test
null
An exception is thrown at runtime.
Compilation fails because of an error in line 1.
Compilation fails because of an error in line 4.
Compilation fails because of an error in line 5.
第22题:
Compilation succeeds and 1 is printed.
Compilation succeeds and 2 is printed.
An error at line 8 causes compilation to fail.
An error at line 13 causes compilation to fail.
An error at line 14 causes compilation to fail.
第23题:
Compilation succeeds.
Compilation fails because of an error at line 5.
Compilation fails because of an error at line 6.
Compilation fails because of an error at line 14.
Compilation fails because of an error at line 17.
第24题:
Compilation succeeds.
An error at line 2 causes compilation to fail.
An error at line 9 causes compilation to fail.
An error at line 10 causes compilation to fail.
An error at line 11 causes compilation to fail.