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问题:单选题How can you create a listener class that receives events when the mouse is moved?()A By extending MouseListener.B By implementing MouseListener.C By extending MouseMotionListener.D By implementing MouseMotionListener.E Either by extending MouseMot...
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问题:单选题public class X { public static void main (Stringargs) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()A The program runs and print...
问题:多选题Which two code fragments will execute the method doStuff() in a separate thread?()Anew Thread() { public void run() { doStuff(); } }Bnew Thread() { public void start() { doStuff(); } }Cnew Thread() { public void start() { doStuff(); } } .run();Dnew Thr...
问题:11. public enum Title { 12. MR(”Mr.”), MRS(”Mrs.”), MS(”Ms....
问题:单选题Which will declare a method that is available to all members of the same package and can be referenced without an instance of the class?()A Abstract public void methoda();B Public abstract double methoda();C Static void methoda(double d1){}D Publi...
问题:单选题//point X public class foo { public static void main (Stringargs) throws Exception { java.io.printWriter out = new java.io.PrintWriter { new java.io.outputStreamWriter (System.out), true; out.printIn(“Hello”); } } } Which statement at Po...
问题:单选题public class X { public static void main (Stringargs) { int a = new int [1] modify(a); System.out.printIn(a[0]); } public static void modify (int a) { a[0] ++; } } What is the result?()A The program runs and prints “0”B The prog...
问题:Which of the following statements are legal?() ...
问题:Which statement is true for the class java.util.ArrayList?()...
问题:Which method is an appropriate way to determine the cosine o...
问题:package foo; import java.util.Vector; private class MyVecto...
问题:单选题public class Foo { public void main( String[] args ) { System.out.println( “Hello” + args[0] ); } } What is the result if this code is executed with the command line?()A HelloB Hello FooC Hello worldD Compilation fails.E The code does not ru...
问题:多选题1. class TestA { 2. TestB b; 3. TestA() { 4. b = new TestB(this); 5. } 6. } 7. class TestB { 8. TestA a; 9. TestB(TestA a) { 10. this.a = a; 11. } 12. } 13. class TestAll { 14. public static void main (String args[]) { 15. new TestAll().m...
问题:单选题What will be written to the standard output when the following program is run?() public class Q63e3 { public static void main(String args[]) { System.out.println(9 ^ 2); } }A 81B 7C 11D 0E false...
问题:单选题Which statement is true?()A Compilation fails because the hashCode method is not overridden.B A HashSet could contain multiple Person objects with the same name.C All Person objects will have the same hash code because the hashCode method is not ov...
问题:多选题Which two statements are reserved words in Java?()ARunBImportCDefaultDImplement...
问题:多选题class A { } class Alpha { private A myA = new A(); void dolt( A a ) { a = null; } void tryIt() { dolt( myA ); } } Which two statements are correct?()AThere are no instanced of A that will become eligible for garbage collection.BExplicitly se...
问题:单选题switch (i) { default: System.out.printIn(“Hello”); } What is the acceptable type for the variable i?()A ByteB LongC FloatD DoubleE ObjectF A and BG C and D...
问题: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 Compilatio...
问题:单选题11.classA { 12. public void process() { System.out.print(”A “); } } 13. class B extends A { 14. public void process() throws RuntimeException { 15. super.process(); 16. if (true) throw new RuntimeException(); 17. System.out.print(“B”); }} 18. pu...