Return string from arraylist

Question

Lets say I have a class

public class Ttype{
    
    private String type = "";

    public Ttype(String type) {
        
        this.type = type;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }
}

and I have arraylist of this class

ArrayList<Ttype> type = new ArrayList<Ttype>();

I have added some elements to the arraylist

type.add( new new Ttype("Hello"));
type.add( new new Ttype("Bye"));
type.add( new new Ttype("Hi"));

I want to be able to return a string when I search for specefic string in the arraylist. What I mean by that is:

Ttype t = type.get("Hello"); //t will be set to "hello" if hello is in the arraylist.

How can I do that?

Answer 1

type.stream()
  .filter(c -> c.getType().equals("test"))
  .collect(Collectors.toList());

Answer 2

Well as others suggested in comments this will be much easy when you use a Map rather than ArrayList. But in your case to achieve what you need you can follow the below steps.This will be much easy when you use streams in Java 8.But I will provide a simple solution which you can achieve without streams.

Ttype result = null;//To store if an object found 
String searchTxt = "Hello";

for(Ttype temp:type){//Iterating through the list find a match

   if(temp.type.equlas(searchTxt)){
       result = temp;
   }

}

Now based on the value which contains in the result you can continue your work.If result is null after the iteration it means there is no matching item found.