Description

Checks that long constants are defined with an upper ell. That is 'L' and not 'l'. This is in accordance with the Java Language Specification, Section 3.10.1.

Rationale: The lower-case ell 'l' looks a lot like 1.

Examples

To configure the check:

<module name="Checker">
  <module name="TreeWalker">
    <module name="UpperEll"/>
  </module>
</module>
        

Example:

class Example1 {
  long var1 = 508987; // OK
  long var2 = 508987l; // violation
  long var3 = 508987L; // OK
}
        

Example of Usage

• Google Style
• Sun Style
• Checkstyle Style

Violation Messages

• upperEll

All messages can be customized if the default message doesn't suit you. Please see the documentation to learn how to.

Package

com.puppycrawl.tools.checkstyle.checks

Parent Module

TreeWalker