The javac command includes a -Xprint flag that uses annotation processing to output a source-code representation of a type.  This flag can be against either source files or class files as the originating location.  When the class file for a enum is used as the originating location, a newline is missed after the last enum constant, unliked when a source file is used as the origination location.

It would be good if this discrepency were fixed.

Example:

>javac -Xprint javax.lang.model.SourceVersion 
package javax.lang.model;

public enum SourceVersion {

  RELEASE_0,
  RELEASE_1,
  RELEASE_2,
  RELEASE_3,
  RELEASE_4,
  RELEASE_5,
  RELEASE_6,
  RELEASE_7;  private static final javax.lang.model.SourceVersion latestSupported;
  private static final java.util.Set<java.lang.String> keywords;

  public static javax.lang.model.SourceVersion[] values();

  public static javax.lang.model.SourceVersion valueOf(java.lang.String arg0);

  private SourceVersion();

  public static javax.lang.model.SourceVersion latest();

  private static javax.lang.model.SourceVersion getLatestSupported();

  public static javax.lang.model.SourceVersion latestSupported();

  public static boolean isIdentifier(java.lang.CharSequence arg0);

  public static boolean isName(java.lang.CharSequence arg0);

  public static boolean isKeyword(java.lang.CharSequence arg0);
}

vs

>javac -Xprint javax/lang/model/SourceVersion.java

package javax.lang.model;

public enum SourceVersion {

  RELEASE_0,
  RELEASE_1,
  RELEASE_2,
  RELEASE_3,
  RELEASE_4,
  RELEASE_5,
  RELEASE_6,
  RELEASE_7;
  public static javax.lang.model.SourceVersion[] values();

  public static javax.lang.model.SourceVersion valueOf(java.lang.String name);

  private SourceVersion();

  public static javax.lang.model.SourceVersion latest();
  private static final javax.lang.model.SourceVersion latestSupported;

  private static javax.lang.model.SourceVersion getLatestSupported();

  public static javax.lang.model.SourceVersion latestSupported();

  public static boolean isIdentifier(java.lang.CharSequence name);

  public static boolean isName(java.lang.CharSequence name);
  private static final java.util.Set<java.lang.String> keywords;

  public static boolean isKeyword(java.lang.CharSequence s);
}