Locale.java (Locale): Don't explicitly check for null.

* java/util/Locale.java (Locale): Don't explicitly check for
	null.
	* java/util/Hashtable.java (containsKey): Don't explicitly check
	for null.
	(get): Likewise.
	* java/util/BitSet.java (and, or, xor): Don't explicitly check for
	null.
	* java/util/zip/ZipEntry.java (ZipEntry): Don't explicitly check
	for null.
	* java/text/StringCharacterIterator.java
	(StringCharacterIterator): Don't check for null.
	* java/text/ChoiceFormat.java (setChoices): Don't explicitly check
	for null pointer.
	* java/net/MulticastSocket.java (joinGroup): Don't explicitly
	check for null pointer.
	(leaveGroup): Likewise.
	* java/net/DatagramPacket.java (DatagramPacket): Removed erroneous
	comment.
	(setData): Likewise.
	* java/lang/ThreadGroup.java (ThreadGroup): Don't explicitly check
	for `p==null'.

From-SVN: r33671

libjava/java/util/BitSet.java

@@ -1,6 +1,6 @@
 // BitSet - A vector of bits.
 
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -24,8 +24,6 @@ public final class BitSet implements Cloneable, Serializable
 {
   public void and (BitSet bs)
     {
-      if (bs == null)
-	throw new NullPointerException ();
       int max = Math.min(bits.length, bs.bits.length);
       int i;
       for (i = 0; i < max; ++i)
@@ -110,8 +108,6 @@ public final class BitSet implements Cloneable, Serializable
 
   public void or (BitSet bs)
     {
-      if (bs == null)
-	throw new NullPointerException ();
       ensure (bs.bits.length - 1);
       int i;
       for (i = 0; i < bs.bits.length; ++i)
@@ -159,8 +155,6 @@ public final class BitSet implements Cloneable, Serializable
 
   public void xor (BitSet bs)
     {
-      if (bs == null)
-	throw new NullPointerException ();
       ensure (bs.bits.length - 1);
       int i;
       for (i = 0; i < bs.bits.length; ++i)

libjava/java/util/Hashtable.java

@@ -164,7 +164,8 @@ public class Hashtable extends Dictionary implements Cloneable, Serializable
     return newTable;
   }
 
-  public synchronized boolean contains(Object value) throws NullPointerException
+  public synchronized boolean contains(Object value)
+    throws NullPointerException
   {
     // An exception is thrown here according to the JDK 1.2 doc.
     if (value == null)
@@ -180,10 +181,6 @@ public class Hashtable extends Dictionary implements Cloneable, Serializable
 
   public synchronized boolean containsKey(Object key)
   {
-    // The Map interface mandates that we throw this.
-    if (key == null)
-      throw new NullPointerException ();
-
     for (HashtableEntry elem = bucket[Math.abs(key.hashCode()
 					       % bucket.length)];
 	 elem != null; elem = elem.nextEntry)
@@ -200,11 +197,6 @@ public class Hashtable extends Dictionary implements Cloneable, Serializable
 
   public synchronized Object get(Object key)
   {
-    // The Dictionary interface mandates that get() throw a
-    // NullPointerException if key is null.
-    if (key == null)
-      throw new NullPointerException ();
-
     for (HashtableEntry elem = bucket[Math.abs (key.hashCode()
 						% bucket.length)];
 	 elem != null; elem = elem.nextEntry)
@@ -225,8 +217,10 @@ public class Hashtable extends Dictionary implements Cloneable, Serializable
   }
 
   public synchronized Object put(Object key, Object value)
-				throws NullPointerException
+    throws NullPointerException
   {
+    // We could really just check `value == null', but checking both
+    // is a bit clearer.
     if (key == null || value == null)
       throw new NullPointerException();
 

libjava/java/util/Locale.java

@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999  Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -65,10 +65,6 @@ public final class Locale implements java.io.Serializable, Cloneable
   public Locale (String languageCode, String countryCode,
 		 String variantCode)
   {
-    // We must explicitly check the arguments.
-    if (languageCode == null || countryCode == null
-	|| variantCode == null)
-      throw new NullPointerException ();
     language = languageCode.toLowerCase();
     country = countryCode.toUpperCase();
     variant = variantCode.toUpperCase();

libjava/java/util/zip/ZipEntry.java

@@ -1,4 +1,4 @@
-/* Copyright (C) 1999  Free Software Foundation
+/* Copyright (C) 1999, 2000  Free Software Foundation
 
    This file is part of libgcj.
 
@@ -39,8 +39,6 @@ public class ZipEntry implements ZipConstants
 
   public ZipEntry (String name)
   {
-    if (name == null)
-      throw new NullPointerException ();
     if (name.length() > 65535)
       throw new IllegalArgumentException ();
     this.name = name;