I want to learn java
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I see you're basically at the same level I saw you on Spigot a year ago... Google is your best friend.
To answer your question because I'm a sucker, here is it:
Constructors are what is called when the class you're using it for is called. Say I have a class called LearnJava.
This here is the bare base of a class, and when using OOP this is very essential. Why would you want to do this? You set bare information and sooner or later make it more complex. Google OOP as well. Anyway, so if we ran the following code:
That would call the constructor because the () represent the constructor, and yes you can pass objects through that as well just like any other method.
HashMaps are key and value based. So say I have two players, one's name is Thing1 and the second is Thing2. We both put them in our little HashMap using the #put() method, and they are assigned a number.
So we put those in there, now if we retrieve them using Map#get() if they exist, they'll return something, if not it'll be null. If we do
it will return 1.
To answer your question because I'm a sucker, here is it:
Constructors are what is called when the class you're using it for is called. Say I have a class called LearnJava.
Code:
class LearnJava {
public LearnJava() {
System.out.println("This is called when you initialized the object");
}
}
Code:
LearnJava lj = new LearnJava();HashMaps are key and value based. So say I have two players, one's name is Thing1 and the second is Thing2. We both put them in our little HashMap using the #put() method, and they are assigned a number.
Code:
Map<String, Integer> map = new HashMap<>();
map.put("Thing1", 1);
map.put("Thing2", 2);
Code:
map.get("Thing1");
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