8022185: Fix Raw and unchecked warnings in classes belonging to java.awt.datatransfer

Reviewed-by: art, pchelko
Contributed-by: NSrikalyan Chandrashekar <srikalyan.chandrashekar@oracle.com>

src/share/classes/java/awt/datatransfer/DataFlavor.java

@@ -101,7 +101,7 @@ import sun.awt.datatransfer.DataTransferer;
 public class DataFlavor implements Externalizable, Cloneable {
 
     private static final long serialVersionUID = 8367026044764648243L;
-    private static final Class ioInputStreamClass = java.io.InputStream.class;
+    private static final Class<InputStream> ioInputStreamClass = InputStream.class;
 
     /**
      * Tries to load a class from: the bootstrap loader, the system loader,
@@ -116,10 +116,10 @@ public class DataFlavor implements Externalizable, Cloneable {
                                                    ClassLoader fallback)
         throws ClassNotFoundException
     {
-        ClassLoader systemClassLoader = (ClassLoader)
+        ClassLoader systemClassLoader =
             java.security.AccessController.doPrivileged(
-                new java.security.PrivilegedAction() {
-                    public Object run() {
+                new java.security.PrivilegedAction<ClassLoader>() {
+                    public ClassLoader run() {
                         ClassLoader cl = Thread.currentThread().
                             getContextClassLoader();
                         return (cl != null)
@@ -142,7 +142,7 @@ public class DataFlavor implements Externalizable, Cloneable {
     /*
      * private initializer
      */
-    static private DataFlavor createConstant(Class rc, String prn) {
+    static private DataFlavor createConstant(Class<?> rc, String prn) {
         try {
             return new DataFlavor(rc, prn);
         } catch (Exception e) {
@@ -314,7 +314,7 @@ public class DataFlavor implements Externalizable, Cloneable {
      * @exception NullPointerException if either <code>primaryType</code>,
      *            <code>subType</code> or <code>representationClass</code> is null
      */
-    private DataFlavor(String primaryType, String subType, MimeTypeParameterList params, Class representationClass, String humanPresentableName) {
+    private DataFlavor(String primaryType, String subType, MimeTypeParameterList params, Class<?> representationClass, String humanPresentableName) {
         super();
         if (primaryType == null) {
             throw new NullPointerException("primaryType");
@@ -331,7 +331,7 @@ public class DataFlavor implements Externalizable, Cloneable {
         params.set("class", representationClass.getName());
 
         if (humanPresentableName == null) {
-            humanPresentableName = (String)params.get("humanPresentableName");
+            humanPresentableName = params.get("humanPresentableName");
 
             if (humanPresentableName == null)
                 humanPresentableName = primaryType + "/" + subType;
@@ -732,7 +732,7 @@ public class DataFlavor implements Externalizable, Cloneable {
         return bestFlavor;
     }
 
-    private static Comparator textFlavorComparator;
+    private static Comparator<DataFlavor> textFlavorComparator;
 
     static class TextFlavorComparator
         extends DataTransferer.DataFlavorComparator {
@@ -1438,6 +1438,6 @@ public class DataFlavor implements Externalizable, Cloneable {
 
     /** Java class of objects this DataFlavor represents **/
 
-    private Class       representationClass;
+    private Class<?>       representationClass;
 
 } // class DataFlavor

src/share/classes/java/awt/datatransfer/MimeTypeParameterList.java

@@ -44,13 +44,13 @@ class MimeTypeParameterList implements Cloneable {
      * Default constructor.
      */
     public MimeTypeParameterList() {
-        parameters = new Hashtable();
+        parameters = new Hashtable<>();
     }
 
     public MimeTypeParameterList(String rawdata)
         throws MimeTypeParseException
     {
-        parameters = new Hashtable();
+        parameters = new Hashtable<>();
 
         //    now parse rawdata
         parse(rawdata);
@@ -59,10 +59,10 @@ class MimeTypeParameterList implements Cloneable {
     public int hashCode() {
         int code = Integer.MAX_VALUE/45; // "random" value for empty lists
         String paramName = null;
-        Enumeration enum_ = this.getNames();
+        Enumeration<String> enum_ = this.getNames();
 
         while (enum_.hasMoreElements()) {
-            paramName = (String)enum_.nextElement();
+            paramName = enum_.nextElement();
             code += paramName.hashCode();
             code += this.get(paramName).hashCode();
         }
@@ -87,14 +87,14 @@ class MimeTypeParameterList implements Cloneable {
         String name = null;
         String thisValue = null;
         String thatValue = null;
-        Set entries = parameters.entrySet();
-        Iterator iterator = entries.iterator();
-        Map.Entry entry = null;
+        Set<Map.Entry<String, String>> entries = parameters.entrySet();
+        Iterator<Map.Entry<String, String>> iterator = entries.iterator();
+        Map.Entry<String, String> entry = null;
         while (iterator.hasNext()) {
-            entry = (Map.Entry)iterator.next();
-            name = (String)entry.getKey();
-            thisValue = (String)entry.getValue();
-            thatValue = (String)that.parameters.get(name);
+            entry = iterator.next();
+            name = entry.getKey();
+            thisValue = entry.getValue();
+            thatValue = that.parameters.get(name);
             if ((thisValue == null) || (thatValue == null)) {
                 // both null -> equal, only one null -> not equal
                 if (thisValue != thatValue) {
@@ -250,7 +250,7 @@ class MimeTypeParameterList implements Cloneable {
      * is no current association.
      */
     public String get(String name) {
-        return (String)parameters.get(name.trim().toLowerCase());
+        return parameters.get(name.trim().toLowerCase());
     }
 
     /**
@@ -271,7 +271,7 @@ class MimeTypeParameterList implements Cloneable {
     /**
      * Retrieve an enumeration of all the names in this list.
      */
-    public Enumeration getNames() {
+    public Enumeration<String> getNames() {
         return parameters.keys();
     }
 
@@ -279,15 +279,15 @@ class MimeTypeParameterList implements Cloneable {
         // Heuristic: 8 characters per field
         StringBuilder buffer = new StringBuilder(parameters.size() * 16);
 
-        Enumeration keys = parameters.keys();
+        Enumeration<String> keys = parameters.keys();
         while(keys.hasMoreElements())
         {
             buffer.append("; ");
 
-            String key = (String)keys.nextElement();
+            String key = keys.nextElement();
             buffer.append(key);
             buffer.append('=');
-               buffer.append(quote((String)parameters.get(key)));
+               buffer.append(quote(parameters.get(key)));
         }
 
         return buffer.toString();
@@ -307,7 +307,7 @@ class MimeTypeParameterList implements Cloneable {
          return newObj;
      }
 
-    private Hashtable parameters;
+    private Hashtable<String, String> parameters;
 
     //    below here be scary parsing related things