Check string is null

Reference Materials String. Start Learning Java. Explore Java Examples. Multiply two Floating Point Numbers. Compute Quotient and Remainder.

Swap Two Numbers. Check Whether a Number is Even or Odd. Check Whether an Alphabet is Vowel or Consonant. Related Topics Java String isEmpty. Java String contains. Java String equalsIgnoreCase. Java String equals. Java String compareTo. Java String compareToIgnoreCase. So how to check null in a String in java , their many approaches that you can use to handle null in String. It depends on you which code is good for you, mostly all code can help you to check null in string in java.

If a String contains some space it will say the string contains some data. How to handle this type of case, We need to check if the string is empty or null or contains space see below example.

Facebook Twitter. String empty java Handling null in the string can be fixed a NullPointerException in your code.

If you only want to check a String is null or blank then used this code. In the example two methods are given, first returns true if the String is null or empty where as second method returns true if the string is not null and not empty. Java 11 onward String class in Java has a isBlank method that returns true if the string is empty or contains only white spaces, false otherwise.

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