To/From Code

	Languages
BROWSEBYLANGUAGE Access VBA ASP Classic C# C++ C++/CLI Corel Paradox Delphi Delphi Prism Java JavaScript Perl PHP VB Classic VB.Net

	Categories
BROWSEBYCATEGORY +Tool Basics +Language Basics +Language Details +Data Structures +Statements +Operators +Commands +Database +OOP Basics +OOP Details

	Java Guides
Java To/From Conversion Guides Java and Access VBA Java and ASP Classic Java and C# Java and C++ Java and C++/CLI Java and Corel Paradox Java and Delphi Prism Java and JavaScript Java and Perl Java and PHP Java and VB Classic Java and VB.Net

Cross Ref Guide

JAVALANGUAGE

Java

JAVAANDDELPHITOC

Overview

+Tool Basics

Report Tools Overview

+Language Basics

+Language Details

+Data Structures

Array

+Statements

+Operators

Empty String Check◄╣

+OOP Basics

+OOP Details

	Members-Only
Sign in to see member-only pages.

► KB ► To/From Guides ► Java

Print This

Empty String Check (Java and Delphi Cross Reference Guide)

By Mike Prestwood

Java versus Delphi: A side by side comparison between Java and Delphi.

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

Delphi: length(s) = 0

Length() or SizeOf() will correctly identify an unassigned string variable or an empty string.

Syntax Example:

if length(s) = 0 then
  ShowMessage('empty string');