how to get one value from arrayList inn java code example

Example 1: find first element of list java

final Object firstElement = list.stream()
  .findFirst()
  .orElse(new Object()) //Give a default value if there are no elements
  
final Object firstElement = list.stream()
  .findFirst()
  .orElseThrow(() -> new Exception()) //Throw an exception if there are no elements

Example 2: java first index of an arraylist

ArrayList<Type> array = new ArrayList<Type>();
System.out.printLn(array[0]);