8271456: Avoid looking up standard charsets in "java.desktop" module

src/java.desktop/macosx/classes/com/apple/laf/AquaFileView.java

@@ -25,15 +25,20 @@
 
 package com.apple.laf;
 
-import java.io.*;
-import java.util.*;
+import java.io.File;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.Map;
 import java.util.Map.Entry;
 
 import javax.swing.Icon;
 import javax.swing.filechooser.FileView;
 
 import com.apple.laf.AquaUtils.RecyclableSingleton;
 
+import static java.nio.charset.StandardCharsets.UTF_8;
+
 @SuppressWarnings("serial") // JDK implementation class
 class AquaFileView extends FileView {
     private static final boolean DEBUG = false;
@@ -106,11 +111,7 @@ static class FileInfo {
         FileInfo(final File file){
             isDirectory = file.isDirectory();
             absolutePath = file.getAbsolutePath();
-            try {
-                pathBytes = absolutePath.getBytes("UTF-8");
-            } catch (final UnsupportedEncodingException e) {
-                pathBytes = new byte[0];
-            }
+            pathBytes = absolutePath.getBytes(UTF_8);
         }
     }
 

src/java.desktop/macosx/classes/sun/lwawt/macosx/CDataTransferer.java

@@ -1,6 +1,5 @@
-
 /*
- * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,20 +25,27 @@
 
 package sun.lwawt.macosx;
 
-import java.awt.*;
-
-import java.io.*;
-import java.net.URI;
-import java.net.URISyntaxException;
+import java.awt.Image;
+import java.awt.datatransfer.DataFlavor;
+import java.awt.datatransfer.Transferable;
+import java.awt.datatransfer.UnsupportedFlavorException;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.net.URL;
 import java.nio.charset.Charset;
 import java.text.Normalizer;
 import java.text.Normalizer.Form;
-import java.util.*;
-import java.util.regex.*;
-import java.awt.datatransfer.*;
-import java.nio.charset.StandardCharsets;
-import sun.awt.datatransfer.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import sun.awt.datatransfer.DataTransferer;
+import sun.awt.datatransfer.ToolkitThreadBlockedHandler;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 public class CDataTransferer extends DataTransferer {
     private static final Map<String, Long> predefinedClipboardNameMap;
@@ -133,7 +139,7 @@ public Object translateBytes(byte[] bytes, DataFlavor flavor,
             String charset = Charset.defaultCharset().name();
             if (transferable != null && transferable.isDataFlavorSupported(javaTextEncodingFlavor)) {
                 try {
-                    charset = new String((byte[]) transferable.getTransferData(javaTextEncodingFlavor), StandardCharsets.UTF_8);
+                    charset = new String((byte[]) transferable.getTransferData(javaTextEncodingFlavor), UTF_8);
                 } catch (UnsupportedFlavorException cannotHappen) {
                 }
             }
@@ -160,7 +166,8 @@ public Object translateBytes(byte[] bytes, DataFlavor flavor,
             // class by base method
             format = CF_STRING;
         } else if (format == CF_STRING) {
-            bytes = Normalizer.normalize(new String(bytes, "UTF8"), Form.NFC).getBytes("UTF8");
+            String src = new String(bytes, UTF_8);
+            bytes = Normalizer.normalize(src, Form.NFC).getBytes(UTF_8);
         }
 
         return super.translateBytes(bytes, flavor, format, transferable);

src/java.desktop/share/classes/com/sun/imageio/plugins/bmp/BMPMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,19 +25,15 @@
 
 package com.sun.imageio.plugins.bmp;
 
-import java.io.UnsupportedEncodingException;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import javax.imageio.ImageTypeSpecifier;
 import javax.imageio.metadata.IIOMetadata;
-import javax.imageio.metadata.IIOMetadataNode;
-import javax.imageio.metadata.IIOMetadataFormat;
 import javax.imageio.metadata.IIOMetadataFormatImpl;
-import org.w3c.dom.Node;
-import com.sun.imageio.plugins.common.I18N;
+import javax.imageio.metadata.IIOMetadataNode;
 
+import com.sun.imageio.plugins.common.I18N;
 import com.sun.imageio.plugins.common.ImageUtil;
+import org.w3c.dom.Node;
+
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
 
 public class BMPMetadata extends IIOMetadata implements BMPConstants {
     public static final String nativeMetadataFormatName =
@@ -114,11 +110,7 @@ public Node getAsTree(String formatName) {
     }
 
     private String toISO8859(byte[] data) {
-        try {
-            return new String(data, "ISO-8859-1");
-        } catch (UnsupportedEncodingException e) {
-            return "";
-        }
+        return new String(data, ISO_8859_1);
     }
 
     private Node getNativeTree() {

src/java.desktop/share/classes/com/sun/imageio/plugins/gif/GIFImageMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,18 +25,17 @@
 
 package com.sun.imageio.plugins.gif;
 
-import java.io.UnsupportedEncodingException;
-import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
-import javax.imageio.ImageTypeSpecifier;
+
 import javax.imageio.metadata.IIOInvalidTreeException;
-import javax.imageio.metadata.IIOMetadata;
-import javax.imageio.metadata.IIOMetadataNode;
-import javax.imageio.metadata.IIOMetadataFormat;
 import javax.imageio.metadata.IIOMetadataFormatImpl;
+import javax.imageio.metadata.IIOMetadataNode;
+
 import org.w3c.dom.Node;
 
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
+
 public class GIFImageMetadata extends GIFMetadata {
 
     // package scope
@@ -132,11 +131,7 @@ public Node getAsTree(String formatName) {
     }
 
     private String toISO8859(byte[] data) {
-        try {
-            return new String(data, "ISO-8859-1");
-        } catch (UnsupportedEncodingException e) {
-            return "";
-        }
+        return new String(data, ISO_8859_1);
     }
 
     private Node getNativeTree() {
@@ -384,12 +379,7 @@ public IIOMetadataNode getStandardTextNode() {
 
         while (commentIter.hasNext()) {
             byte[] comment = commentIter.next();
-            String s = null;
-            try {
-                s = new String(comment, "ISO-8859-1");
-            } catch (UnsupportedEncodingException e) {
-                throw new RuntimeException("Encoding ISO-8859-1 unknown!");
-            }
+            String s = new String(comment, ISO_8859_1);
 
             node = new IIOMetadataNode("TextEntry");
             node.setAttribute("value", s);

src/java.desktop/share/classes/com/sun/imageio/plugins/gif/GIFWritableImageMetadata.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2005, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,19 +25,17 @@
 
 package com.sun.imageio.plugins.gif;
 
-import java.io.UnsupportedEncodingException;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
-import javax.imageio.ImageTypeSpecifier;
+
 import javax.imageio.metadata.IIOInvalidTreeException;
-import javax.imageio.metadata.IIOMetadata;
-import javax.imageio.metadata.IIOMetadataNode;
-import javax.imageio.metadata.IIOMetadataFormat;
 import javax.imageio.metadata.IIOMetadataFormatImpl;
+import javax.imageio.metadata.IIOMetadataNode;
+
 import org.w3c.dom.Node;
 
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
+
 class GIFWritableImageMetadata extends GIFImageMetadata {
 
     // package scope
@@ -95,11 +93,7 @@ public void reset() {
     }
 
     private byte[] fromISO8859(String data) {
-        try {
-            return data.getBytes("ISO-8859-1");
-        } catch (UnsupportedEncodingException e) {
-            return "".getBytes();
-        }
+        return data.getBytes(ISO_8859_1);
     }
 
     protected void mergeNativeTree(Node root) throws IIOInvalidTreeException {

src/java.desktop/share/classes/com/sun/imageio/plugins/jpeg/COMMarkerSegment.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,15 +25,16 @@
 
 package com.sun.imageio.plugins.jpeg;
 
+import java.io.IOException;
+
+import javax.imageio.metadata.IIOInvalidTreeException;
 import javax.imageio.metadata.IIOMetadataNode;
 import javax.imageio.stream.ImageOutputStream;
-import javax.imageio.metadata.IIOInvalidTreeException;
-
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
 
 import org.w3c.dom.Node;
 
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
+
 /**
  * A Comment marker segment.  Retains an array of bytes representing the
  * comment data as it is read from the stream.  If the marker segment is
@@ -45,7 +46,6 @@
  * byte array, again assuming the default local encoding.
  */
 class COMMarkerSegment extends MarkerSegment {
-    private static final String ENCODING = "ISO-8859-1";
 
     /**
      * Constructs a marker segment from the given buffer, which contains
@@ -96,10 +96,7 @@ class COMMarkerSegment extends MarkerSegment {
      * consulted directly.
      */
     String getComment() {
-        try {
-            return new String (data, ENCODING);
-        } catch (UnsupportedEncodingException e) {}  // Won't happen
-        return null;
+        return new String(data, ISO_8859_1);
     }
 
     /**

src/java.desktop/share/classes/com/sun/imageio/plugins/jpeg/JFIFMarkerSegment.java

@@ -25,40 +25,41 @@
 
 package com.sun.imageio.plugins.jpeg;
 
-import javax.imageio.IIOException;
-import javax.imageio.IIOImage;
-import javax.imageio.ImageTypeSpecifier;
-import javax.imageio.ImageReader;
-import javax.imageio.metadata.IIOInvalidTreeException;
-import javax.imageio.metadata.IIOMetadataNode;
-import javax.imageio.metadata.IIOMetadata;
-import javax.imageio.stream.ImageInputStream;
-import javax.imageio.stream.ImageOutputStream;
-import javax.imageio.stream.MemoryCacheImageOutputStream;
-import javax.imageio.event.IIOReadProgressListener;
-
 import java.awt.Graphics;
-import java.awt.color.ICC_Profile;
-import java.awt.color.ICC_ColorSpace;
 import java.awt.color.ColorSpace;
+import java.awt.color.ICC_ColorSpace;
+import java.awt.color.ICC_Profile;
+import java.awt.image.BufferedImage;
 import java.awt.image.ColorModel;
-import java.awt.image.SampleModel;
-import java.awt.image.IndexColorModel;
 import java.awt.image.ComponentColorModel;
-import java.awt.image.BufferedImage;
 import java.awt.image.DataBuffer;
 import java.awt.image.DataBufferByte;
+import java.awt.image.IndexColorModel;
 import java.awt.image.Raster;
+import java.awt.image.SampleModel;
 import java.awt.image.WritableRaster;
-import java.io.IOException;
 import java.io.ByteArrayOutputStream;
-import java.util.List;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
+import java.util.List;
 
+import javax.imageio.IIOException;
+import javax.imageio.IIOImage;
+import javax.imageio.ImageReader;
+import javax.imageio.ImageTypeSpecifier;
+import javax.imageio.event.IIOReadProgressListener;
+import javax.imageio.metadata.IIOInvalidTreeException;
+import javax.imageio.metadata.IIOMetadataNode;
+import javax.imageio.stream.ImageInputStream;
+import javax.imageio.stream.ImageOutputStream;
+import javax.imageio.stream.MemoryCacheImageOutputStream;
+
+import org.w3c.dom.NamedNodeMap;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
-import org.w3c.dom.NamedNodeMap;
+
+import static java.nio.charset.StandardCharsets.US_ASCII;
 
 /**
  * A JFIF (JPEG File Interchange Format) APP0 (Application-Specific)
@@ -1353,7 +1354,7 @@ static void writeICC(ICC_Profile profile, ImageOutputStream ios)
             ios.write(0xff);
             ios.write(JPEG.APP2);
             MarkerSegment.write2bytes(ios, segLength);
-            byte [] id = ID.getBytes("US-ASCII");
+            byte[] id = ID.getBytes(US_ASCII);
             ios.write(id);
             ios.write(0); // Null-terminate the string
             ios.write(chunkNum++);