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Tip: Convert an Operand to a String

Learn how to convert various types of operands to strings.


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When one of the two operands is not a string, it is converted to a String as follows:

  • an operand whose type is a primitive type is converted as if by calling toString() on the boxed value.
  • an operand whose type is a reference type is converted by calling the operand's toString() method.
  • if the operand is null, or if the toString() method returns null, then the string literal "null" is used instead.

 

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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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