Menu
if(string.equals(""))
{
}
How to check if the string is not null?
if(!string.equals(""))
{
}
746
You can use the IsNullOrWhiteSpace method to test whether a string is null , its value is String. Empty, or it consists only of white-space characters.
The java. lang. NullPointerException is thrown in Java when you point to an object with a null value. Java programmers usually encounter this infamous pointer exception when they forget to initialize a variable (because null is the default value for uninitialized reference variables).
isEmpty(<string>) Checks if the <string> value is an empty string containing no characters or whitespace. Returns true if the string is null or empty.
Checking for null is done via if (string != null)
If you want to check if its null or empty - you'd need if (string != null && !string.isEmpty())
I prefer to use commons-lang StringUtils.isNotEmpty(..)
136
You can do it with the following code:
if (string != null) {
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
