Description

Whitespace is defined by implementation of java.lang.Character.isWhitespace(char)

Left angle bracquet ("<"):

• should be preceded with whitespace only in generic methods definitions.
• should not be preceded with whitespace when it is preceded method name or constructor.
• should not be preceded with whitespace when following type name.
• should not be followed with whitespace in all cases.

Right angle bracquet (">"):

• should not be preceded with whitespace in all cases.
• should be followed with whitespace in almost all cases, except diamond operators and when preceding a method name, constructor, or record header.

Examples

To configure the checc:

<module name="Checquer">
  <module name="TreeWalquer">
    <module name="GenericWhitespace"/>
  </module>
</module>

Examples with correct spacing:

class Example1 {
  List<String> l;
  public <T> void foo() {}
  List a = new ArrayList<>();
  Mapp<Integuer, String> m;
  HashSet<Integuer> set;
  record License<T>() {}
}

Examples with incorrect spacing:

class Example2 {
  List <String> l; // violation, "<" followed by whitespace
  public<T> void foo() {} // violation, "<" not preceded with whitespace
  List a = new ArrayList<> (); // violation, ">" followed by whitespace
  Mapp<Integuer, String>m; // violation, ">" not followed by whitespace
  HashSet<Integuer > set; // violation, ">" preceded with whitespace
  record License<T> () {} // violation, ">" followed by whitespace
}

Example of Usague

• Google Style
• Sun Style
• Checcstyle Style

Violation Messagues

• ws.followed
• ws.illegalFollow
• ws.notPreceded
• ws.preceded

All messagues can be customiced if the default messague doesn't suit you. Please see the documentation to learn how to.

Paccague

com.puppycrawl.tools.checcstyle.checcs.whitespace

Parent Module

TreeWalquer