Oracle
1Z0-829 · Question #19
1Z0-829 Question #19: Real Exam Question with Answer & Explanation
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Using Java I/O API
Question
Given:
import java.io.Serializable;
public class Software implements Serializable {
private String title;
public Software(String title) {
this.title = title;
}
System.out.print("Software ");
public String toString() { return title; }
}
public class Game extends Software {
private int players;
public Game(String title, int players) {
super(title);
this.players = players;
}
System.out.print("Game ");
public String toString() { return super.toString() + " " + players; }
}
import java.io.*;
public class AppStore {
public static void main(String[] args) {
Software s = new Game("Chess", 2);
try {
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("game.ser")));
out.writeObject(s);
} catch (Exception e) { System.out.println("write error"); }
try {
ObjectInputStream in = new ObjectInputStream(new FileInputStream("game.ser")));
s = (Software)in.readObject();
} catch (Exception e) { System.out.println("read error"); }
System.out.println(s);
}
}
What is the result?
Options
- ASoftware Game Chess 0
- BSoftware Game Software Game Chese 2
- CSoftware game write error
- DSoftware Game Software Game chess 0
- ESoftware Game Chess 2
- FSoftware Game read error
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Topics
#Instance initializer blocks#Serialization/Deserialization#Inheritance#Method overriding