diff --git a/runtime/Java/src/org/antlr/v4/runtime/ANTLRErrorStrategy.java b/runtime/Java/src/org/antlr/v4/runtime/ANTLRErrorStrategy.java
index c45285b18..fbcc3239d 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/ANTLRErrorStrategy.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/ANTLRErrorStrategy.java
@@ -87,7 +87,8 @@ public interface ANTLRErrorStrategy {
 	 *  use to recover better.
 	 */
 	void recover(@NotNull Parser recognizer,
-				 @NotNull RecognitionException e);
+				 @NotNull RecognitionException e)
+		throws RecognitionException;
 
 	/** Make sure that the current lookahead symbol is consistent with
 	 *  what were expecting at this point in the ATN. You can call this
@@ -116,7 +117,8 @@ public interface ANTLRErrorStrategy {
 	 *  turn off this functionality by simply overriding this method as
 	 *  a blank { }.
 	 */
-	void sync(@NotNull Parser recognizer);
+	void sync(@NotNull Parser recognizer)
+		throws RecognitionException;
 
 	/** Is the parser in the process of recovering from an error? Upon
 	 *  a syntax error, the parser enters recovery mode and stays there until
@@ -136,6 +138,5 @@ public interface ANTLRErrorStrategy {
 
 	/** Report any kind of RecognitionException. */
 	void reportError(@NotNull Parser recognizer,
-					 @NotNull RecognitionException e)
-	throws RecognitionException;
+					 @NotNull RecognitionException e);
 }
diff --git a/runtime/Java/src/org/antlr/v4/runtime/DefaultErrorStrategy.java b/runtime/Java/src/org/antlr/v4/runtime/DefaultErrorStrategy.java
index 9dfa5d0eb..12be5122c 100644
--- a/runtime/Java/src/org/antlr/v4/runtime/DefaultErrorStrategy.java
+++ b/runtime/Java/src/org/antlr/v4/runtime/DefaultErrorStrategy.java
@@ -114,7 +114,6 @@ public class DefaultErrorStrategy implements ANTLRErrorStrategy {
 	@Override
 	public void reportError(Parser recognizer,
 							RecognitionException e)
-		throws RecognitionException
 	{
 		// if we've already reported an error and have not matched a token
 		// yet successfully, don't report any errors.
@@ -185,7 +184,7 @@ public class DefaultErrorStrategy implements ANTLRErrorStrategy {
 	 *  We opt to stay in the loop as long as possible.
  	 */
 	@Override
-	public void sync(Parser recognizer) {
+	public void sync(Parser recognizer) throws RecognitionException {
 		ATNState s = recognizer.getInterpreter().atn.states.get(recognizer.getState());
 //		System.err.println("sync @ "+s.stateNumber+"="+s.getClass().getSimpleName());
 		// If already recovering, don't try to sync
@@ -232,7 +231,6 @@ public class DefaultErrorStrategy implements ANTLRErrorStrategy {
 
 	public void reportNoViableAlternative(@NotNull Parser recognizer,
 										  @NotNull NoViableAltException e)
-	throws RecognitionException
 	{
 		TokenStream tokens = recognizer.getInputStream();
 		String input;
@@ -249,7 +247,6 @@ public class DefaultErrorStrategy implements ANTLRErrorStrategy {
 
 	public void reportInputMismatch(@NotNull Parser recognizer,
 									@NotNull InputMismatchException e)
-		throws RecognitionException
 	{
 		String msg = "mismatched input "+getTokenErrorDisplay(e.getOffendingToken())+
 		" expecting "+e.getExpectedTokens().toString(recognizer.getTokenNames());
@@ -258,7 +255,6 @@ public class DefaultErrorStrategy implements ANTLRErrorStrategy {
 
 	public void reportFailedPredicate(@NotNull Parser recognizer,
 									  @NotNull FailedPredicateException e)
-		throws RecognitionException
 	{
 		String ruleName = recognizer.getRuleNames()[recognizer._ctx.getRuleIndex()];
 		String msg = "rule "+ruleName+" "+e.getMessage();