Check string value null

First of "0" isn't false, its true. Because '0' is a string. Strings if they exist return true. That said if your data is returning zeros as strings you can use:. This will return the integer value or NaN. NaN will return true, and if it is an number of say Also, I agree with the comment that dfsq made in that you shouldn't rely on this. You should know and understand what types your variables are holding. How are we doing? Please help us improve Stack Overflow.

Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Check if string zero, zero, empty string, null Ask Question.

Asked 7 years, 1 month ago. Active 4 years ago. Viewed 10k times. Andreas Louv How to handle this type of case, We need to check if the string is empty or null or contains space see below example 3 In CoreJava Programming we can use the trim method to handle the above example. Only we need to add a trim method to handle a String contains space in java. For using this you need to download apache-commons jar. Tags CoreJava string. You might like Show more. Post a Comment. Previous Post Next Post.

However, the program doesn't consider it an empty string. This is because white spaces are treated as characters in Java and the string with white spaces is a regular string.

Now, if we want the program to consider strings with white spaces as empty strings, we can use the trim method. The method removes all the white spaces present in a string. Course Index Explore Programiz. Java for Loop. Arrays in Java. Interfaces in Java. Java ArrayList. Popular Examples Check prime number. Print the Fibonacci series.

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