79. Given classes defined in two different files: 1. package packageA； 2. public class Message{ 3. String getText(){return "text"；} 4. } And: 1. package packageB； 2. public class XMLMessage extends packageA .Message{ 3. String getText(){return "＜msg＞text＜/msg＞"；} 4. public static void main(String[] args) { 5. System.out.println(new XMLMessage().getText())； 6. } 7. } What is the result of executing XMLMessage.main? (A) text (B) Compilation fails. (C) ＜msg＞text＜/msg＞ (D) An exception is thrown at runtime.

複選題74. Which two classes correctly implement both the java.lang.Runnable and the java.lang.Cloneable interfaces? (Choose two.) (A) public class Session implements Runnable, cloneable { public void run()； public Object clone()； } (B) public class Session extends Runnable, Cloneable { public void run(){/* do something */} public Object clone(){/* make a copy */} } (C) public class Session implements Runnable, Cloneable { public void run(){/* do something */} public Object clone() {/* make a copy */} } (D) public abstract class Session implements Runnable, Cloneable { public void run(){/* do something */} public Object clone(){/* make a copy */} } (E) public class Session implements Runnable, implements Cloneable { public void run(){/* do something */} public Object clone() {/* make a copy */} }

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