SeparatorWrap

Since Checkstyle 5.8

Description

Checks line wrapping with separators.

Properties

name	description	type	default value	since
option	Specify policy on how to wrap lines.	WrapOption	`eol`	5.8
tokens	tokens to check	subset of tokens DOT , COMMA , SEMI , ELLIPSIS , AT , LPAREN , RPAREN , ARRAY_DECLARATOR , RBRACK , METHOD_REF .	DOT , COMMA .	5.8

Examples

To configure the check:


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

Example:


import java.io.
          IOException; // OK, dot is on the previous line

class Example1 {
  String s;

  public void foo(int a,
                    int b) { // OK, comma is on the previous line
  }

  public void bar(int p
                    , int q) { // violation '',' should be on the previous line'
    if (s
          .isEmpty()) { // violation ''.' should be on the previous line'
    }
  }
}

To configure the check for METHOD_REF at new line:


<module name="Checker">
  <module name="TreeWalker">
    <module name="SeparatorWrap">
      <property name="tokens" value="METHOD_REF"/>
      <property name="option" value="nl"/>
    </module>
  </module>
</module>

Example:


import java.util.Arrays;

class Example2 {
  String[] stringArray = {"foo", "bar"};

  void fun() {
    // violation below ''::' should be on a new line'
    Arrays.sort(stringArray, String::
      compareToIgnoreCase);
    Arrays.sort(stringArray, String
      ::compareTo); // OK, because it is on a new line
  }
}

To configure the check for comma at the new line:


<module name="Checker">
  <module name="TreeWalker">
    <module name="SeparatorWrap">
      <property name="tokens" value="COMMA"/>
      <property name="option" value="nl"/>
    </module>
  </module>
</module>

Example:


class Example3 {
  String s;

  int a,
    b; // violation above '',' should be on a new line'

  void foo(int a,
                int b) { // violation above '',' should be on a new line'
    int r
      , t; // OK, because it is on a new line
  }

  void bar(int p
                , int q) { // OK, because it is on a new line
  }
}

Example of Usage

Violation Messages

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