Safe unboxing in Java

public class Numbers {
  private Numbers() {
  }
 
  public static boolean valueOf(Boolean b) {
    return valueOf(b, false);
  }
 
  public static boolean valueOf(Boolean b1, boolean b2) {
    if (null == b1) {
      return b2;
    } else {
      return b1.booleanValue();
    }
  }
 
  public static byte valueOf(Byte b) {
    return valueOf(b, (byte)0);
  }
 
  public static byte valueOf(Byte b1, byte b2) {
    if (null == b1) {
      return b2;
    } else {
      return b1.byteValue();
    }
  }
 
  public static char valueOf(Character c) {
    return valueOf(c, '\u0000');
  }
 
  public static char valueOf(Character c1, char c2) {
    if (null == c1) {
      return c2;
    } else {
      return c1.charValue();
    }
  }
 
  public static short valueOf(Short s) {
    return valueOf(s, (short)0);
  }
 
  public static short valueOf(Short s1, short s2) {
    if (null == s1) {
      return s2;
    } else {
      return s1.shortValue();
    }
  }
 
  public static int valueOf(Integer i) {
    return valueOf(i, 0);
  }
 
  public static int valueOf(Integer i1, int i2) {
    if (null == i1) {
      return i2;
    } else {
      return i1.intValue();
    }
  }
 
  public static long valueOf(Long l) {
    return valueOf(l, 0L);
  }
 
  public static long valueOf(Long l1, long l2) {
    if (null == l1) {
      return l2;
    } else {
      return l1.longValue();
    }
  }
 
  public static float valueOf(Float f) {
    return valueOf(f, 0.0f);
  }
 
  public static float valueOf(Float f1, float f2) {
    if (null == f1) {
      return f2;
    } else {
      return f1.floatValue();
    }
  }
 
  public static double valueOf(Double d) {
    return valueOf(d, 0.0d);
  }
 
  public static double valueOf(Double d1, double d2) {
    if (null == d1) {
      return d2;
    } else {
      return d1.doubleValue();
    }
  }
}