//point X public class foo ( public static void main (Stringargs) throws Exception { printWriter out = new PrintWriter (new ) java.io.outputStreamWriter (System.out), true; out.printIn(“Hello”); } ) Which statement at PointX on line 1 allows this code to compile and run?()
A、 Import java.io.PrintWriter;
B、 Include java.io.PrintWriter;
C、 Import java.io.OutputStreamWriter;
D、 Include java.io.OutputStreamWriter;
E、 No statement is needed.
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Which two declarations prevent the overriding of a method?()
AFinal void methoda() {}
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11. class Payload { 12. private int weight; 13. public Payload(int wt) { weight = wt; } 13. public void setWeight(mt w) { weight = w; } 15. public String toString { return Integer.toString(weight); } 16. } 17. 18. public class TestPayload { 19. static void changePayload(Payload p) { 20. /* insert code here */ 21. } 22. 23. public static void main(String[] args) { 24. Payload p = new Payload(); 25. p.setWeight(1024); 26. changePayload(p); 27. System.out.println(”The value of p is “+ p); 28. } 29. } Which statement, placed at line 20, causes the code to print “The value of p is 420.”?()
A、 p.setWeight(420);
B、 p.changePayload(420);
C、 p = new Payload(420);
D、 Payload.setWeight(420);
E、 p = Payload.setWeight(420);
F、 p = new Payload(); p.setWeight(420);
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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?()
A、 Compilation will fail.
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C、 Compilation will succeed but the program will throw a ClassCastException at line 6.
D、 Compilation will succeed but the program will throw a ClassCastException at line 7.
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A class design requires that a member variable cannot be accessible directly outside the class. Which modifier should be used to obtain the access control?()
A、 public
B、 no modifier
C、 protected
D、 private
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Which two code fragments are most likely to cause a StackOverflowError?()
AA
BB
CC
DD
EE
FF