单项选择题
A. Compilation fails.
B. 1 restored 42
C. 12 restored 42
D. 121 restored 42
E. 1212 restored 42
F. An exception is thrown at runtime.
单项选择题 Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given: import java.io.*; class Food implemertts Serializable {int good = 3;} class Fruit externds Food {int juice = 5;} public class Banana extends Fruit { int yellow = 4; public static void main(String [] args) { Banana b = new Banana(); Banana b2 = new Banana(); b.serializeBanana(b); // assume correct serialization b2 = b.deserializeBanana(); // assume correct System.out.println(”restore “+b2.yellow+ b2.juice+b2.good); } // more Banana methods go here } What is the result?()
多项选择题 Whichthreeconcerningtheuseofthejava.io.Serializableinterfacearetrue?()
单项选择题 1. import java.io.*; 2. public class Foo implements Serializable { 3. public int x, y; 4. public Foo( int x, int y) { this.x = x; this.y = y; } 5. 6. private void writeObject( ObjectOutputStream s) 7. throws IOException { 8. s.writeInt(x); s.writeInt(y) 9. } 10. 11. private void readObject( ObjectInputStream s) 12. throws IOException, ClassNotFoundException { 13. 14. // insert code here 15. 16. } 17. } Which code, inserted at line 14, will allow this class to correctly serialize and deserialize?()