Why there are flower braces for accessing a method.

Question

0.00/5 (No votes)

See more:

Consider a class

Java

class Person(){
   private int age;

   public int getAge(){
       return age;
   }

}

To access the method getAge() we can directly call it as

Java

new Person().getAge();

What I have tried:

but while using Typetoken Class Why am i supposed to call the method getType() like this.

Java

new TypeToken<List<T>>(){}.getType();

Why should i put flower braces. what is the reason.

Posted 12-Oct-17 2:50am

Member 13461301

Updated 12-Oct-17 4:07am

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Answer 1 · 2017-10-12T04:07:00

Solution 1

The curly braces there are to provide a default value for the new instance, and in this case are irrelevant as there is no initialization data in it so they can be omitted.

They are often seen in lists, arrays, and so forth:

C#

List<string> names = new List<string>() { "John", "Mike", "Susan" };

Posted 12-Oct-17 4:07am

OriginalGriff

Comments

Member 13461301 13-Oct-17 3:31am

But when i am not using the flower braces. The IDEshows error that the TypeToken has protected access.
the line shows error `new TypeToken<List<t>>().getType();`
But this `new TypeToken<List<t>>(){}.getType();` doesn't.
This class is from gson library.