Description

Checks the policy on the padding of parentheses for typecasts. That is, whether a space is required after a left parenthesis and before a right parenthesis, or such spaces are forbidden.

Properties

Examples

To configure the check:

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

Example:

class Example1 {
  float f1 = 3.14f;

  int n = ( int ) f1; // 2 violations

  double d = 1.234567;

  float f2 = (float ) d; // violation 'preceded with whitespace'

  float f3 = (float) d;

  float f4 = ( float) d; // violation 'followed by whitespace'
}
        

To configure the check to require spaces:

<module name="Checker">
  <module name="TreeWalker">
    <module name="TypecastParenPad">
      <property name="option" value="space"/>
    </module>
  </module>
</module>
        

Example:

class Example2 {
  double d1 = 3.14;

  int n = ( int ) d1;

  int m = (int ) d1; // violation 'not followed by whitespace'

  double d2 = 9.8;

  int x = (int) d2; // 2 violations

  int y = ( int) d2; // violation 'not preceded with whitespace'
}
        

Example of Usage

• Sun Style
• Checkstyle Style

Violation Messages

• ws.followed
• ws.notFollowed
• ws.notPreceded
• ws.preceded

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.whitespace

Parent Module

TreeWalker