Provide an exception message.

Author: Gary Gregory

src/main/java/org/apache/commons/io/StandardLineSeparator.java

@@ -50,7 +50,7 @@ public enum StandardLineSeparator {
      * @param lineSeparator a non-null line separator.
      */
     StandardLineSeparator(final String lineSeparator) {
-        this.lineSeparator = Objects.requireNonNull(lineSeparator);
+        this.lineSeparator = Objects.requireNonNull(lineSeparator, "lineSeparator");
     }
 
     /**

src/main/java/org/apache/commons/io/filefilter/AndFileFilter.java

@@ -60,7 +60,7 @@ public AndFileFilter() {
      * @param initialList the initial list.
      */
     private AndFileFilter(final ArrayList<IOFileFilter> initialList) {
-        this.fileFilters = Objects.requireNonNull(initialList);
+        this.fileFilters = Objects.requireNonNull(initialList, "initialList");
     }
 
     /**
@@ -104,7 +104,7 @@ public AndFileFilter(final IOFileFilter... fileFilters) {
      * @since 1.1
      */
     public AndFileFilter(final List<IOFileFilter> fileFilters) {
-        this(new ArrayList<>(Objects.requireNonNull(fileFilters)));
+        this(new ArrayList<>(Objects.requireNonNull(fileFilters, "fileFilters")));
     }
 
     /**

src/main/java/org/apache/commons/io/filefilter/OrFileFilter.java

@@ -56,7 +56,7 @@ public OrFileFilter() {
      * @param initialList the initial list.
      */
     private OrFileFilter(final ArrayList<IOFileFilter> initialList) {
-        this.fileFilters = Objects.requireNonNull(initialList);
+        this.fileFilters = Objects.requireNonNull(initialList, "initialList");
     }
 
     /**
@@ -99,7 +99,7 @@ public OrFileFilter(final IOFileFilter filter1, final IOFileFilter filter2) {
      * @since 1.1
      */
     public OrFileFilter(final List<IOFileFilter> fileFilters) {
-        this(new ArrayList<>(Objects.requireNonNull(fileFilters)));
+        this(new ArrayList<>(Objects.requireNonNull(fileFilters, "fileFilters")));
     }
 
     /**

src/main/java/org/apache/commons/io/function/IOConsumer.java

@@ -49,7 +49,7 @@ public interface IOConsumer<T> {
      * @throws NullPointerException if {@code after} is null
      */
     default IOConsumer<T> andThen(final IOConsumer<? super T> after) {
-        Objects.requireNonNull(after);
+        Objects.requireNonNull(after, "after");
         return (final T t) -> {
             accept(t);
             after.accept(t);

src/main/java/org/apache/commons/io/function/IOFunction.java

@@ -59,7 +59,7 @@ public interface IOFunction<T, R> {
      * @see #andThen(IOFunction)
      */
     default <V> IOFunction<V, R> compose(final IOFunction<? super V, ? extends T> before) {
-        Objects.requireNonNull(before);
+        Objects.requireNonNull(before, "before");
         return (final V v) -> apply(before.apply(v));
     }
 
@@ -79,7 +79,7 @@ default <V> IOFunction<V, R> compose(final IOFunction<? super V, ? extends T> be
      * @see #andThen(IOFunction)
      */
     default <V> IOFunction<V, R> compose(final Function<? super V, ? extends T> before) {
-        Objects.requireNonNull(before);
+        Objects.requireNonNull(before, "before");
         return (final V v) -> apply(before.apply(v));
     }
 
@@ -97,7 +97,7 @@ default <V> IOFunction<V, R> compose(final Function<? super V, ? extends T> befo
      * @see #andThen(IOFunction)
      */
     default IOSupplier<R> compose(final IOSupplier<? extends T> before) {
-        Objects.requireNonNull(before);
+        Objects.requireNonNull(before, "before");
         return () -> apply(before.get());
     }
 
@@ -115,7 +115,7 @@ default IOSupplier<R> compose(final IOSupplier<? extends T> before) {
      * @see #andThen(IOFunction)
      */
     default IOSupplier<R> compose(final Supplier<? extends T> before) {
-        Objects.requireNonNull(before);
+        Objects.requireNonNull(before, "before");
         return () -> apply(before.get());
     }
 
@@ -135,7 +135,7 @@ default IOSupplier<R> compose(final Supplier<? extends T> before) {
      * @see #compose(IOFunction)
      */
     default <V> IOFunction<T, V> andThen(final IOFunction<? super R, ? extends V> after) {
-        Objects.requireNonNull(after);
+        Objects.requireNonNull(after, "after");
         return (final T t) -> after.apply(apply(t));
     }
 
@@ -155,7 +155,7 @@ default <V> IOFunction<T, V> andThen(final IOFunction<? super R, ? extends V> af
      * @see #compose(IOFunction)
      */
     default <V> IOFunction<T, V> andThen(final Function<? super R, ? extends V> after) {
-        Objects.requireNonNull(after);
+        Objects.requireNonNull(after, "after");
         return (final T t) -> after.apply(apply(t));
     }
 
@@ -173,7 +173,7 @@ default <V> IOFunction<T, V> andThen(final Function<? super R, ? extends V> afte
      * @see #compose(IOFunction)
      */
     default IOConsumer<T> andThen(final IOConsumer<? super R> after) {
-        Objects.requireNonNull(after);
+        Objects.requireNonNull(after, "after");
         return (final T t) -> after.accept(apply(t));
     }
 
@@ -191,7 +191,7 @@ default IOConsumer<T> andThen(final IOConsumer<? super R> after) {
      * @see #compose(IOFunction)
      */
     default IOConsumer<T> andThen(final Consumer<? super R> after) {
-        Objects.requireNonNull(after);
+        Objects.requireNonNull(after, "after");
         return (final T t) -> after.accept(apply(t));
     }
 

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

@@ -65,7 +65,7 @@ public class UnsynchronizedByteArrayInputStream extends InputStream {
      * @param data the buffer
      */
     public UnsynchronizedByteArrayInputStream(final byte[] data) {
-        this.data = Objects.requireNonNull(data);
+        this.data = Objects.requireNonNull(data, "data");
         this.offset = 0;
         this.eod = data.length;
         this.markedOffset = this.offset;
@@ -80,7 +80,7 @@ public UnsynchronizedByteArrayInputStream(final byte[] data) {
      * @throws IllegalArgumentException if the offset is less than zero
      */
     public UnsynchronizedByteArrayInputStream(final byte[] data, final int offset) {
-        Objects.requireNonNull(data);
+        Objects.requireNonNull(data, "data");
         if (offset < 0) {
             throw new IllegalArgumentException("offset cannot be negative");
         }
@@ -107,7 +107,7 @@ public UnsynchronizedByteArrayInputStream(final byte[] data, final int offset, f
         if (length < 0) {
             throw new IllegalArgumentException("length cannot be negative");
         }
-        this.data = Objects.requireNonNull(data);
+        this.data = Objects.requireNonNull(data, "data");
         this.offset = min(offset, data.length > 0 ? data.length : offset);
         this.eod = min(this.offset + length, data.length);
         this.markedOffset = this.offset;
@@ -125,13 +125,13 @@ public int read() {
 
     @Override
     public int read(final byte[] dest) {
-        Objects.requireNonNull(dest);
+        Objects.requireNonNull(dest, "dest");
         return read(dest, 0, dest.length);
     }
 
     @Override
     public int read(final byte[] dest, final int off, final int len) {
-        Objects.requireNonNull(dest);
+        Objects.requireNonNull(dest, "dest");
         if (off < 0 || len < 0 || off + len > dest.length) {
             throw new IndexOutOfBoundsException();
         }

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

@@ -141,7 +141,7 @@ public String getDefaultEncoding() {
      * @throws IOException thrown if there is a problem reading the file.
      */
     public XmlStreamReader(final File file) throws IOException {
-        this(new FileInputStream(Objects.requireNonNull(file)));
+        this(new FileInputStream(Objects.requireNonNull(file, "file")));
     }
 
     /**

src/main/java/org/apache/commons/io/input/buffer/CircularByteBuffer.java

@@ -87,7 +87,7 @@ public byte read() {
      *                                  exception.
      */
     public void read(final byte[] targetBuffer, final int targetOffset, final int length) {
-        Objects.requireNonNull(targetBuffer);
+        Objects.requireNonNull(targetBuffer, "targetBuffer");
         if (targetOffset < 0 || targetOffset >= targetBuffer.length) {
             throw new IllegalArgumentException("Invalid offset: " + targetOffset);
         }