Initializing ArrayList with some predefined values [duplicate]

Question

I have an sample program as shown.

I want my ArrayList symbolsPresent to be initialized with some predefined symbols: ONE, TWO, THREE, and FOUR.

symbolsPresent.add("ONE"); symbolsPresent.add("TWO"); symbolsPresent.add("THREE"); symbolsPresent.add("FOUR"); 

import java.util.ArrayList;  public class Test {      private ArrayList<String> symbolsPresent = new ArrayList<String>();      public ArrayList<String> getSymbolsPresent() {         return symbolsPresent;     }      public void setSymbolsPresent(ArrayList<String> symbolsPresent) {         this.symbolsPresent = symbolsPresent;     }      public static void main(String args[]) {             Test t = new Test();         System.out.println("Symbols Present is" + t.symbolsPresent);      }     } 

Is that possible?

Answer 1

try this

new String[] {"One","Two","Three","Four"}; 

or

List<String> places = Arrays.asList("One", "Two", "Three"); 

ARRAYS

Answer 2

Double brace initialization is an option:

List<String> symbolsPresent = new ArrayList<String>() {{    add("ONE");    add("TWO");    add("THREE");    add("FOUR"); }}; 

Note that the String generic type argument is necessary in the assigned expression as indicated by JLS §15.9

It is a compile-time error if a class instance creation expression declares an anonymous class using the "<>" form for the class's type arguments.