IfPresentExample.java

public class IfPresentExample {
    
    public static void main(String[] args) {
        
        List<Integer> numbers = Arrays.asList(10, 20, 30, 40, 50, 60, 70, 80, 90);
    
    
                Optional<Integer> first =  numbers.stream().filter(a -> a > 500).findFirst();
        
                
        first.ifPresentOrElse( a-> System.out.println(a), () -> System.out.println(""));
        
    }
}