ArrayList(int initialCapacity) == why initial capacity not present ?

Hi,
I'm trying to create an ArrayList of initial size 5, and later on to set the first entry to a value :
List TrList = new ArrayList(5);
    System.out.println(TrList.size());
    TrList.set(0,4);
    System.out.println(TrList.get(0));When I run this I get :
0
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.set(ArrayList.java:337)
at vampstatistics.TransactionFileHandler.ReadGlobalDataAndWriteToFile(Main.java:58)
at vampstatistics.Main.main(Main.java:249)
Java Result: 1

The English word "capacity" refers to how much an object CAN hold, not how much it DOES hold. So an empty jug could have a 2-litre capacity, meaning that it could hold 2 litres of water.

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ArrayList(int initialCapacity) == why initial capacity not present ?

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