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Empty String Check (Java and C# Cross Reference Guide)

By Mike Prestwood

Java versus C#: A side by side comparison between Java and C#.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Empty String Check

[Other Languages] 

Languages Focus

An empty string is a zero length string, a string that is equal to null (""), or not assigned. In some languages, you can check if a string is empty by comparing it to an empty string (""). Some languages distinguish between nil and null ("") so checking if the length is 0 is easier.

Java:   IsEmpty
C#:   String.IsNullOrEmpty

The .Net framework offers a static method in the string class: String.IsNullOrEmpty.

Syntax Example:
String s;
 
s = "";
//s = null; //Uncomment to test 2nd case.
 
if (String.IsNullOrEmpty(s))
{
  MessageBox.Show("empty string");
}












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