Answered: You have been handed a mysterious piece…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

You have been handed a mysterious piece of data by an unknown person. Judging by his shifty eyes and maniacal laughter you don't think he can be trusted. Complete the below method to tell you the type for this unknown data. The example already implemented can be adapted for other wrapper classes as well. Complete the method to analyze String, Character, and Double. Examples: whatAmI(1) -> "Integer"

X468: Generics - Generic Method 2
You have been handed a mysterious piece of data by an unknown person. Judging by his shifty eyes and maniacal laughter you don't think he can be trusted. Complete the below method to tell you the type for
this unknown data.
The example already implemented can be adapted for other wrapper classes as well. Complete the method to analyze String, Character, and Double.
Examples:
whatAmI (1) -> "Integer"

Your Answer:
1 public String whatAmI (E e) {
*
567
8
9
10|
NFO
11
12
13}
14
//.getClass() returns the runtime class of an object
//.equals() determines whether two objects are equivalent
//by calling a new static instance of a wrapper object we can analyze
//it's class type and compare it to the variable passed in
if(e.getClass().equals(new Integer (1).getClass())){
return "Integer";
return "Who knows!";
}else{
}

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