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diff --git a/libjava/classpath/java/lang/Integer.java b/libjava/classpath/java/lang/Integer.java
new file mode 100644
index 000000000..f379795ea
--- /dev/null
+++ b/libjava/classpath/java/lang/Integer.java
@@ -0,0 +1,841 @@
+/* Integer.java -- object wrapper for int
+   Copyright (C) 1998, 1999, 2001, 2002, 2004, 2005
+   Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.lang;
+
+/**
+ * Instances of class <code>Integer</code> represent primitive
+ * <code>int</code> values.
+ *
+ * Additionally, this class provides various helper functions and variables
+ * related to ints.
+ *
+ * @author Paul Fisher
+ * @author John Keiser
+ * @author Warren Levy
+ * @author Eric Blake (ebb9@email.byu.edu)
+ * @author Tom Tromey (tromey@redhat.com)
+ * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
+ * @author Ian Rogers
+ * @since 1.0
+ * @status updated to 1.5
+ */
+public final class Integer extends Number implements Comparable<Integer>
+{
+  /**
+   * Compatible with JDK 1.0.2+.
+   */
+  private static final long serialVersionUID = 1360826667806852920L;
+
+  /**
+   * The minimum value an <code>int</code> can represent is -2147483648 (or
+   * -2<sup>31</sup>).
+   */
+  public static final int MIN_VALUE = 0x80000000;
+
+  /**
+   * The maximum value an <code>int</code> can represent is 2147483647 (or
+   * 2<sup>31</sup> - 1).
+   */
+  public static final int MAX_VALUE = 0x7fffffff;
+
+  /**
+   * The primitive type <code>int</code> is represented by this
+   * <code>Class</code> object.
+   * @since 1.1
+   */
+  public static final Class<Integer> TYPE = (Class<Integer>) VMClassLoader.getPrimitiveClass('I');
+
+  /**
+   * The number of bits needed to represent an <code>int</code>.
+   * @since 1.5
+   */
+  public static final int SIZE = 32;
+
+  // This caches some Integer values, and is used by boxing
+  // conversions via valueOf().  We must cache at least -128..127;
+  // these constants control how much we actually cache.
+  private static final int MIN_CACHE = -128;
+  private static final int MAX_CACHE = 127;
+  private static final Integer[] intCache = new Integer[MAX_CACHE - MIN_CACHE + 1];
+  static
+  {
+    for (int i=MIN_CACHE; i <= MAX_CACHE; i++)
+      intCache[i - MIN_CACHE] = new Integer(i);
+  }
+
+  /**
+   * The immutable value of this Integer.
+   *
+   * @serial the wrapped int
+   */
+  private final int value;
+
+  /**
+   * Create an <code>Integer</code> object representing the value of the
+   * <code>int</code> argument.
+   *
+   * @param value the value to use
+   */
+  public Integer(int value)
+  {
+    this.value = value;
+  }
+
+  /**
+   * Create an <code>Integer</code> object representing the value of the
+   * argument after conversion to an <code>int</code>.
+   *
+   * @param s the string to convert
+   * @throws NumberFormatException if the String does not contain an int
+   * @see #valueOf(String)
+   */
+  public Integer(String s)
+  {
+    value = parseInt(s, 10, false);
+  }
+
+  /**
+   * Return the size of a string large enough to hold the given number
+   *
+   * @param num the number we want the string length for (must be positive)
+   * @param radix the radix (base) that will be used for the string
+   * @return a size sufficient for a string of num
+   */
+  private static int stringSize(int num, int radix) {
+    int exp;
+    if (radix < 4)
+      {
+        exp = 1;
+      }
+    else if (radix < 8)
+      {
+        exp = 2;
+      }
+    else if (radix < 16)
+      {
+        exp = 3;
+      }
+    else if (radix < 32)
+      {
+        exp = 4;
+      }
+    else
+      {
+        exp = 5;
+      }
+    int size=0;
+    do
+      {
+        num >>>= exp;
+        size++;
+      }
+    while(num != 0);
+    return size;
+  }
+
+  /**
+   * Converts the <code>int</code> to a <code>String</code> using
+   * the specified radix (base). If the radix exceeds
+   * <code>Character.MIN_RADIX</code> or <code>Character.MAX_RADIX</code>, 10
+   * is used instead. If the result is negative, the leading character is
+   * '-' ('\\u002D'). The remaining characters come from
+   * <code>Character.forDigit(digit, radix)</code> ('0'-'9','a'-'z').
+   *
+   * @param num the <code>int</code> to convert to <code>String</code>
+   * @param radix the radix (base) to use in the conversion
+   * @return the <code>String</code> representation of the argument
+   */
+  public static String toString(int num, int radix)
+  {
+    if (radix < Character.MIN_RADIX || radix > Character.MAX_RADIX)
+      radix = 10;
+
+    // Is the value negative?
+    boolean isNeg = num < 0;
+
+    // Is the string a single character?
+    if (!isNeg && num < radix)
+      return new String(digits, num, 1, true);
+
+    // Compute string size and allocate buffer
+    // account for a leading '-' if the value is negative
+    int size;
+    int i;
+    char[] buffer;
+    if (isNeg)
+      {
+        num = -num;
+
+        // When the value is MIN_VALUE, it overflows when made positive
+        if (num < 0)
+          {
+            i = size = stringSize(MAX_VALUE, radix) + 2;
+            buffer = new char[size];
+            buffer[--i] = digits[(int) (-(num + radix) % radix)];
+            num = -(num / radix);
+          }
+        else
+          {
+            i = size = stringSize(num, radix) + 1;
+            buffer = new char[size];
+          }
+      }
+    else
+      {
+        i = size = stringSize(num, radix);
+        buffer = new char[size];
+      }
+
+    do
+      {
+        buffer[--i] = digits[num % radix];
+        num /= radix;
+      }
+    while (num > 0);
+
+    if (isNeg)
+      buffer[--i] = '-';
+
+    // Package constructor avoids an array copy.
+    return new String(buffer, i, size - i, true);
+  }
+
+  /**
+   * Converts the <code>int</code> to a <code>String</code> assuming it is
+   * unsigned in base 16.
+   *
+   * @param i the <code>int</code> to convert to <code>String</code>
+   * @return the <code>String</code> representation of the argument
+   */
+  public static String toHexString(int i)
+  {
+    return toUnsignedString(i, 4);
+  }
+
+  /**
+   * Converts the <code>int</code> to a <code>String</code> assuming it is
+   * unsigned in base 8.
+   *
+   * @param i the <code>int</code> to convert to <code>String</code>
+   * @return the <code>String</code> representation of the argument
+   */
+  public static String toOctalString(int i)
+  {
+    return toUnsignedString(i, 3);
+  }
+
+  /**
+   * Converts the <code>int</code> to a <code>String</code> assuming it is
+   * unsigned in base 2.
+   *
+   * @param i the <code>int</code> to convert to <code>String</code>
+   * @return the <code>String</code> representation of the argument
+   */
+  public static String toBinaryString(int i)
+  {
+    return toUnsignedString(i, 1);
+  }
+
+  /**
+   * Converts the <code>int</code> to a <code>String</code> and assumes
+   * a radix of 10.
+   *
+   * @param i the <code>int</code> to convert to <code>String</code>
+   * @return the <code>String</code> representation of the argument
+   * @see #toString(int, int)
+   */
+  public static String toString(int i)
+  {
+    // This is tricky: in libgcj, String.valueOf(int) is a fast native
+    // implementation.  In Classpath it just calls back to
+    // Integer.toString(int, int).
+    return String.valueOf(i);
+  }
+
+  /**
+   * Converts the specified <code>String</code> into an <code>int</code>
+   * using the specified radix (base). The string must not be <code>null</code>
+   * or empty. It may begin with an optional '-', which will negate the answer,
+   * provided that there are also valid digits. Each digit is parsed as if by
+   * <code>Character.digit(d, radix)</code>, and must be in the range
+   * <code>0</code> to <code>radix - 1</code>. Finally, the result must be
+   * within <code>MIN_VALUE</code> to <code>MAX_VALUE</code>, inclusive.
+   * Unlike Double.parseDouble, you may not have a leading '+'.
+   *
+   * @param str the <code>String</code> to convert
+   * @param radix the radix (base) to use in the conversion
+   * @return the <code>String</code> argument converted to <code>int</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as an
+   *         <code>int</code>
+   */
+  public static int parseInt(String str, int radix)
+  {
+    return parseInt(str, radix, false);
+  }
+
+  /**
+   * Converts the specified <code>String</code> into an <code>int</code>.
+   * This function assumes a radix of 10.
+   *
+   * @param s the <code>String</code> to convert
+   * @return the <code>int</code> value of <code>s</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as an
+   *         <code>int</code>
+   * @see #parseInt(String, int)
+   */
+  public static int parseInt(String s)
+  {
+    return parseInt(s, 10, false);
+  }
+
+  /**
+   * Creates a new <code>Integer</code> object using the <code>String</code>
+   * and specified radix (base).
+   *
+   * @param s the <code>String</code> to convert
+   * @param radix the radix (base) to convert with
+   * @return the new <code>Integer</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as an
+   *         <code>int</code>
+   * @see #parseInt(String, int)
+   */
+  public static Integer valueOf(String s, int radix)
+  {
+    return valueOf(parseInt(s, radix, false));
+  }
+
+  /**
+   * Creates a new <code>Integer</code> object using the <code>String</code>,
+   * assuming a radix of 10.
+   *
+   * @param s the <code>String</code> to convert
+   * @return the new <code>Integer</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as an
+   *         <code>int</code>
+   * @see #Integer(String)
+   * @see #parseInt(String)
+   */
+  public static Integer valueOf(String s)
+  {
+    return valueOf(parseInt(s, 10, false));
+  }
+
+  /**
+   * Returns an <code>Integer</code> object wrapping the value.
+   * In contrast to the <code>Integer</code> constructor, this method
+   * will cache some values.  It is used by boxing conversion.
+   *
+   * @param val the value to wrap
+   * @return the <code>Integer</code>
+   */
+  public static Integer valueOf(int val)
+  {
+    if (val < MIN_CACHE || val > MAX_CACHE)
+      return new Integer(val);
+    else
+      return intCache[val - MIN_CACHE];
+  }
+
+  /**
+   * Return the value of this <code>Integer</code> as a <code>byte</code>.
+   *
+   * @return the byte value
+   */
+  public byte byteValue()
+  {
+    return (byte) value;
+  }
+
+  /**
+   * Return the value of this <code>Integer</code> as a <code>short</code>.
+   *
+   * @return the short value
+   */
+  public short shortValue()
+  {
+    return (short) value;
+  }
+
+  /**
+   * Return the value of this <code>Integer</code>.
+   * @return the int value
+   */
+  public int intValue()
+  {
+    return value;
+  }
+
+  /**
+   * Return the value of this <code>Integer</code> as a <code>long</code>.
+   *
+   * @return the long value
+   */
+  public long longValue()
+  {
+    return value;
+  }
+
+  /**
+   * Return the value of this <code>Integer</code> as a <code>float</code>.
+   *
+   * @return the float value
+   */
+  public float floatValue()
+  {
+    return value;
+  }
+
+  /**
+   * Return the value of this <code>Integer</code> as a <code>double</code>.
+   *
+   * @return the double value
+   */
+  public double doubleValue()
+  {
+    return value;
+  }
+
+  /**
+   * Converts the <code>Integer</code> value to a <code>String</code> and
+   * assumes a radix of 10.
+   *
+   * @return the <code>String</code> representation
+   */
+  public String toString()
+  {
+    return String.valueOf(value);
+  }
+
+  /**
+   * Return a hashcode representing this Object. <code>Integer</code>'s hash
+   * code is simply its value.
+   *
+   * @return this Object's hash code
+   */
+  public int hashCode()
+  {
+    return value;
+  }
+
+  /**
+   * Returns <code>true</code> if <code>obj</code> is an instance of
+   * <code>Integer</code> and represents the same int value.
+   *
+   * @param obj the object to compare
+   * @return whether these Objects are semantically equal
+   */
+  public boolean equals(Object obj)
+  {
+    return obj instanceof Integer && value == ((Integer) obj).value;
+  }
+
+  /**
+   * Get the specified system property as an <code>Integer</code>. The
+   * <code>decode()</code> method will be used to interpret the value of
+   * the property.
+   *
+   * @param nm the name of the system property
+   * @return the system property as an <code>Integer</code>, or null if the
+   *         property is not found or cannot be decoded
+   * @throws SecurityException if accessing the system property is forbidden
+   * @see System#getProperty(String)
+   * @see #decode(String)
+   */
+  public static Integer getInteger(String nm)
+  {
+    return getInteger(nm, null);
+  }
+
+  /**
+   * Get the specified system property as an <code>Integer</code>, or use a
+   * default <code>int</code> value if the property is not found or is not
+   * decodable. The <code>decode()</code> method will be used to interpret
+   * the value of the property.
+   *
+   * @param nm the name of the system property
+   * @param val the default value
+   * @return the value of the system property, or the default
+   * @throws SecurityException if accessing the system property is forbidden
+   * @see System#getProperty(String)
+   * @see #decode(String)
+   */
+  public static Integer getInteger(String nm, int val)
+  {
+    Integer result = getInteger(nm, null);
+    return result == null ? valueOf(val) : result;
+  }
+
+  /**
+   * Get the specified system property as an <code>Integer</code>, or use a
+   * default <code>Integer</code> value if the property is not found or is
+   * not decodable. The <code>decode()</code> method will be used to
+   * interpret the value of the property.
+   *
+   * @param nm the name of the system property
+   * @param def the default value
+   * @return the value of the system property, or the default
+   * @throws SecurityException if accessing the system property is forbidden
+   * @see System#getProperty(String)
+   * @see #decode(String)
+   */
+  public static Integer getInteger(String nm, Integer def)
+  {
+    if (nm == null || "".equals(nm))
+      return def;
+    nm = System.getProperty(nm);
+    if (nm == null)
+      return def;
+    try
+      {
+        return decode(nm);
+      }
+    catch (NumberFormatException e)
+      {
+        return def;
+      }
+  }
+
+  /**
+   * Convert the specified <code>String</code> into an <code>Integer</code>.
+   * The <code>String</code> may represent decimal, hexadecimal, or
+   * octal numbers.
+   *
+   * <p>The extended BNF grammar is as follows:<br>
+   * <pre>
+   * <em>DecodableString</em>:
+   *      ( [ <code>-</code> ] <em>DecimalNumber</em> )
+   *    | ( [ <code>-</code> ] ( <code>0x</code> | <code>0X</code>
+   *              | <code>#</code> ) <em>HexDigit</em> { <em>HexDigit</em> } )
+   *    | ( [ <code>-</code> ] <code>0</code> { <em>OctalDigit</em> } )
+   * <em>DecimalNumber</em>:
+   *        <em>DecimalDigit except '0'</em> { <em>DecimalDigit</em> }
+   * <em>DecimalDigit</em>:
+   *        <em>Character.digit(d, 10) has value 0 to 9</em>
+   * <em>OctalDigit</em>:
+   *        <em>Character.digit(d, 8) has value 0 to 7</em>
+   * <em>DecimalDigit</em>:
+   *        <em>Character.digit(d, 16) has value 0 to 15</em>
+   * </pre>
+   * Finally, the value must be in the range <code>MIN_VALUE</code> to
+   * <code>MAX_VALUE</code>, or an exception is thrown.
+   *
+   * @param str the <code>String</code> to interpret
+   * @return the value of the String as an <code>Integer</code>
+   * @throws NumberFormatException if <code>s</code> cannot be parsed as a
+   *         <code>int</code>
+   * @throws NullPointerException if <code>s</code> is null
+   * @since 1.2
+   */
+  public static Integer decode(String str)
+  {
+    return valueOf(parseInt(str, 10, true));
+  }
+
+  /**
+   * Compare two Integers numerically by comparing their <code>int</code>
+   * values. The result is positive if the first is greater, negative if the
+   * second is greater, and 0 if the two are equal.
+   *
+   * @param i the Integer to compare
+   * @return the comparison
+   * @since 1.2
+   */
+  public int compareTo(Integer i)
+  {
+    if (value == i.value)
+      return 0;
+    // Returns just -1 or 1 on inequality; doing math might overflow.
+    return value > i.value ? 1 : -1;
+  }
+
+  /**
+   * Return the number of bits set in x.
+   * @param x value to examine
+   * @since 1.5
+   */
+  public static int bitCount(int x)
+  {
+    // Successively collapse alternating bit groups into a sum.
+    x = ((x >> 1) & 0x55555555) + (x & 0x55555555);
+    x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
+    x = ((x >> 4) & 0x0f0f0f0f) + (x & 0x0f0f0f0f);
+    x = ((x >> 8) & 0x00ff00ff) + (x & 0x00ff00ff);
+    return ((x >> 16) & 0x0000ffff) + (x & 0x0000ffff);
+  }
+
+  /**
+   * Rotate x to the left by distance bits.
+   * @param x the value to rotate
+   * @param distance the number of bits by which to rotate
+   * @since 1.5
+   */
+  public static int rotateLeft(int x, int distance)
+  {
+    // This trick works because the shift operators implicitly mask
+    // the shift count.
+    return (x << distance) | (x >>> - distance);
+  }
+
+  /**
+   * Rotate x to the right by distance bits.
+   * @param x the value to rotate
+   * @param distance the number of bits by which to rotate
+   * @since 1.5
+   */
+  public static int rotateRight(int x, int distance)
+  {
+    // This trick works because the shift operators implicitly mask
+    // the shift count.
+    return (x << - distance) | (x >>> distance);
+  }
+
+  /**
+   * Find the highest set bit in value, and return a new value
+   * with only that bit set.
+   * @param value the value to examine
+   * @since 1.5
+   */
+  public static int highestOneBit(int value)
+  {
+    value |= value >>> 1;
+    value |= value >>> 2;
+    value |= value >>> 4;
+    value |= value >>> 8;
+    value |= value >>> 16;
+    return value ^ (value >>> 1);
+  }
+
+  /**
+   * Return the number of leading zeros in value.
+   * @param value the value to examine
+   * @since 1.5
+   */
+  public static int numberOfLeadingZeros(int value)
+  {
+    value |= value >>> 1;
+    value |= value >>> 2;
+    value |= value >>> 4;
+    value |= value >>> 8;
+    value |= value >>> 16;
+    return bitCount(~value);
+  }
+
+  /**
+   * Find the lowest set bit in value, and return a new value
+   * with only that bit set.
+   * @param value the value to examine
+   * @since 1.5
+   */
+  public static int lowestOneBit(int value)
+  {
+    // Classic assembly trick.
+    return value & - value;
+  }
+
+  /**
+   * Find the number of trailing zeros in value.
+   * @param value the value to examine
+   * @since 1.5
+   */
+  public static int numberOfTrailingZeros(int value)
+  {
+    return bitCount((value & -value) - 1);
+  }
+
+  /**
+   * Return 1 if x is positive, -1 if it is negative, and 0 if it is
+   * zero.
+   * @param x the value to examine
+   * @since 1.5
+   */
+  public static int signum(int x)
+  {
+    return (x >> 31) | (-x >>> 31);
+
+    // The LHS propagates the sign bit through every bit in the word;
+    // if X < 0, every bit is set to 1, else 0.  if X > 0, the RHS
+    // negates x and shifts the resulting 1 in the sign bit to the
+    // LSB, leaving every other bit 0.
+
+    // Hacker's Delight, Section 2-7
+  }
+
+  /**
+   * Reverse the bytes in val.
+   * @since 1.5
+   */
+  public static int reverseBytes(int val)
+  {
+    return (  ((val >> 24) & 0xff)
+            | ((val >> 8) & 0xff00)
+            | ((val << 8) & 0xff0000)
+            | ((val << 24) & 0xff000000));
+  }
+
+  /**
+   * Reverse the bits in val.
+   * @since 1.5
+   */
+  public static int reverse(int val)
+  {
+    // Successively swap alternating bit groups.
+    val = ((val >> 1) & 0x55555555) + ((val << 1) & ~0x55555555);
+    val = ((val >> 2) & 0x33333333) + ((val << 2) & ~0x33333333);
+    val = ((val >> 4) & 0x0f0f0f0f) + ((val << 4) & ~0x0f0f0f0f);
+    val = ((val >> 8) & 0x00ff00ff) + ((val << 8) & ~0x00ff00ff);
+    return ((val >> 16) & 0x0000ffff) + ((val << 16) & ~0x0000ffff);
+  }
+
+  /**
+   * Helper for converting unsigned numbers to String.
+   *
+   * @param num the number
+   * @param exp log2(digit) (ie. 1, 3, or 4 for binary, oct, hex)
+   */
+  // Package visible for use by Long.
+  static String toUnsignedString(int num, int exp)
+  {
+    // Compute string length
+    int size = 1;
+    int copy = num >>> exp;
+    while (copy != 0)
+      {
+        size++;
+        copy >>>= exp;
+      }
+    // Quick path for single character strings
+    if (size == 1)
+      return new String(digits, num, 1, true);
+
+    // Encode into buffer
+    int mask = (1 << exp) - 1;
+    char[] buffer = new char[size];
+    int i = size;
+    do
+      {
+        buffer[--i] = digits[num & mask];
+        num >>>= exp;
+      }
+    while (num != 0);
+
+    // Package constructor avoids an array copy.
+    return new String(buffer, i, size - i, true);
+  }
+
+  /**
+   * Helper for parsing ints, used by Integer, Short, and Byte.
+   *
+   * @param str the string to parse
+   * @param radix the radix to use, must be 10 if decode is true
+   * @param decode if called from decode
+   * @return the parsed int value
+   * @throws NumberFormatException if there is an error
+   * @throws NullPointerException if decode is true and str if null
+   * @see #parseInt(String, int)
+   * @see #decode(String)
+   * @see Byte#parseByte(String, int)
+   * @see Short#parseShort(String, int)
+   */
+  static int parseInt(String str, int radix, boolean decode)
+  {
+    if (! decode && str == null)
+      throw new NumberFormatException();
+    int index = 0;
+    int len = str.length();
+    boolean isNeg = false;
+    if (len == 0)
+      throw new NumberFormatException("string length is null");
+    int ch = str.charAt(index);
+    if (ch == '-')
+      {
+        if (len == 1)
+          throw new NumberFormatException("pure '-'");
+        isNeg = true;
+        ch = str.charAt(++index);
+      }
+    else if (ch == '+')
+      {
+        if (len == 1)
+          throw new NumberFormatException("pure '+'");
+        ch = str.charAt(++index);
+      }
+    if (decode)
+      {
+        if (ch == '0')
+          {
+            if (++index == len)
+              return 0;
+            if ((str.charAt(index) & ~('x' ^ 'X')) == 'X')
+              {
+                radix = 16;
+                index++;
+              }
+            else
+              radix = 8;
+          }
+        else if (ch == '#')
+          {
+            radix = 16;
+            index++;
+          }
+      }
+    if (index == len)
+      throw new NumberFormatException("non terminated number: " + str);
+
+    int max = MAX_VALUE / radix;
+    // We can't directly write `max = (MAX_VALUE + 1) / radix'.
+    // So instead we fake it.
+    if (isNeg && MAX_VALUE % radix == radix - 1)
+      ++max;
+
+    int val = 0;
+    while (index < len)
+      {
+        if (val < 0 || val > max)
+          throw new NumberFormatException("number overflow (pos=" + index + ") : " + str);
+
+        ch = Character.digit(str.charAt(index++), radix);
+        val = val * radix + ch;
+        if (ch < 0 || (val < 0 && (! isNeg || val != MIN_VALUE)))
+          throw new NumberFormatException("invalid character at position " + index + " in " + str);
+      }
+    return isNeg ? -val : val;
+  }
+}