Summary

In the java.io package, remove the synchronized keyword from the mark(int) and reset() methods of the InputStream and FilterInputStream classes.

Problem

For the indicated methods, the synchronized keyword does not appear to add any value.

Solution

Remove the synchronized keyword from the declarations of the indicated methods.

Specification

--- a/src/java.base/share/classes/java/io/FilterInputStream.java
+++ b/src/java.base/share/classes/java/io/FilterInputStream.java
@@ -204,7 +204,7 @@ public class FilterInputStream extends InputStream {
      * @see     java.io.FilterInputStream#reset()
      */
     @Override
-    public synchronized void mark(int readlimit) {
+    public void mark(int readlimit) {
         in.mark(readlimit);
     }

@@ -230,7 +230,7 @@ public class FilterInputStream extends InputStream {
      * @see        java.io.FilterInputStream#mark(int)
      */
     @Override
-    public synchronized void reset() throws IOException {
+    public void reset() throws IOException {
         in.reset();
     }

--- a/src/java.base/share/classes/java/io/InputStream.java
+++ b/src/java.base/share/classes/java/io/InputStream.java
@@ -683,7 +683,7 @@ public abstract class InputStream implements Closeable {
      *                      the mark position becomes invalid.
      * @see     java.io.InputStream#reset()
      */
-    public synchronized void mark(int readlimit) {}
+    public void mark(int readlimit) {}

     /**
      * Repositions this stream to the position at the time the
@@ -729,7 +729,7 @@ public abstract class InputStream implements Closeable {
      * @see     java.io.InputStream#mark(int)
      * @see     java.io.IOException
      */
-    public synchronized void reset() throws IOException {
+    public void reset() throws IOException {
         throw new IOException("mark/reset not supported");
     }