This method was introduced from Java 9.
This method is similar to the ifPresent() method which I introduced in this tutorial, but here is a difference since we have one more Runnable parameter, so that in-case if the Optional object is empty, the object of the Runnable interface will be executed.
For example:
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package com.huongdanjava.javaexample; import java.util.Optional; public class Example { public static void main(String[] args) { String s = null; Optional<String> opt = Optional.ofNullable(s); opt.ifPresentOrElse( x -> System.out.println(x), () -> System.out.println("No value")); } } |
Result:
