check if null java code example

Example 1: java checking for null

Objects.isNull(obj) //returns true if the object is null

Objects.nonNull(obj) //returns true if object is not-null

if(Objects.nonNull(foo) && foo.something()) // Uses short-circuit as well. No Null-pointer Exceptions are thrown.

Example 2: Null check

function exists (value) {
  return x != null ? Promise.resolve(value) : Promise.reject(`Invalid value: ${value}`)
}