Package com.puppycrawl.tools.checkstyle.checks.coding

Class MissingCtorCheck

  • All Implemented Interfaces:
    Configurable, Contextualizable
    public class MissingCtorCheck
extends AbstractCheck

    Checks that classes (except abstract ones) define a constructor and don't rely on the default one.

    To configure the check: 

     <module name="MissingCtor"/>

    Example:

     class ExampleOk { // OK
   private int a;
   ExampleOk(int a) {
     this.a = a;
   }
 }
 class ExampleDefaultCtor { // OK
   private String s;
   ExampleDefaultCtor() {
     s = "foobar";
   }
 }
 class InvalidExample { // violation, class must have a constructor.
   public void test() {}
 }
 abstract class AbstractExample { // OK
   public abstract void test() {}
 }

    Parent is com.puppycrawl.tools.checkstyle.TreeWalker

    Violation Message Keys:

    • missing.ctor
    Since:
    3.4