There are many options to handle null values in a stream:
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We can use lambda expression str -> str!= null inside stream filter() to filter out null values from a stream.
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stream()… I chose Collections. emptySet() arbitrarily as the default value in case collection is null . This will result in the stream() method call producing an empty Stream if collection is null.
Read moreIs empty or size == 0 Java?
To check if an ArrayList is empty, you can use ArrayList. isEmpty() method or first check if the ArrayList is null, and if not null, check its size using ArrayList. size() method. The size of an empty ArrayList is zero .
Read moreHow do you check if a list is null?
Empty lists are considered False in Python, hence the bool() function would return False if the list was passed as an argument . Other methods you can use to check if a list is empty are placing it inside an if statement, using the len() methods, or comparing it with an empty list.
Read moreDoes list isEmpty () check for null?
isEmpty() doesn’t check if a list is null . If you are using the Spring framework you can use the CollectionUtils class to check if a list is empty or not.22 Mar 2016
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