How do I define an object with curly brackets?

Processing Coding Questions
1

I want to define objects in an array like this:

{name: "name", temp: 123, ...}

How would I do this?

-Grim

2

Are you talking about Java or JavaScript?

3

You could create a class for those properties: :nerd_face:

class Stuff {
  constructor(name, temp) {
    this.name = name, this.temp = temp;
  }
}
4

I am talking about Java.

5

Well, I did. I made a class.

6

I doesn’t work for Java I don’t think.

7

Well, the curly {} syntax is JS. Therefore I’ve replied to you assuming it was JS! :roll_eyes:

8

Is there anything like this in Java?

9

Yes, the JS class code below: :computer:

class Stuff {
  constructor(name, temp) {
    this.name = name, this.temp = temp;
  }
}

Would be like this in Java Mode: :coffee:

class Stuff {
  String name;
  int temp;

  Stuff(String name, int temp) {
    this.name = name;
    this.temp = temp;
  }
}
10

I meant the curly bracket definitions.

11

Java creates objects exclusively via classes and the operator new. :face_with_monocle:
JS is more flexible. But still I like the class approach better, even in JS. :crazy_face:

1 Like
12

Alrighty then. Thanks for the help!

13

Java doesn’t have the syntax you’re talking about.

But note that if you have a class with a constructor:

class MyClass{
  String name;
  int temp;
  public MyClass(String name, int temp){
    this.name = name;
    this.temp = temp;
  }
}

Then you can call that constructor and place the instances in an array, like this:

MyClass[] myArray = { new MyClass("name", 123), new MyClass("Grimtim10", 42) }

Shameless self-promotion: here is a guide on creating classes in Processing:

2 Likes
14

Hi @Grimtin10!
What you’re referring to is called a hashmap in Java, dictionary in Python, and kind of similar to JSON in JavaScript. In Java, you can use the HashMap data structure:

HashMap<String, Object> dict= new HashMap<String, Object>();

void setup() {
  size(400, 400);
  dict.put("name", "Grimtin10");
  dict.put("temp", 123);

  println(dict);
  println(dict.get("name"));
  println(dict.get("temp"));
}