Simpler lambdas.

Author: garydgregory

src/main/java/org/apache/commons/io/input/ProxyInputStream.java

@@ -144,7 +144,7 @@ public int available() throws IOException {
      */
     @Override
     public void close() throws IOException {
-        IOUtils.close(in, e -> handleIOException(e));
+        IOUtils.close(in, this::handleIOException);
     }
 
     /**

src/main/java/org/apache/commons/io/output/ProxyOutputStream.java

@@ -114,7 +114,7 @@ public void flush() throws IOException {
      */
     @Override
     public void close() throws IOException {
-        IOUtils.close(out, e -> handleIOException(e));
+        IOUtils.close(out, this::handleIOException);
     }
 
     /**

src/main/java/org/apache/commons/io/output/ProxyWriter.java

@@ -205,7 +205,7 @@ public void flush() throws IOException {
      */
     @Override
     public void close() throws IOException {
-        IOUtils.close(out, e -> handleIOException(e));
+        IOUtils.close(out, this::handleIOException);
     }
 
     /**