code: private void setRadix(int radix) {
          // Android-changed: Complain loudly if a bogus radix is being set.
          if (radix > Character.MAX_RADIX) {
              throw new IllegalArgumentException("radix == " + radix);
          }
  
          if (this.radix != radix) {
              // Force rebuilding and recompilation of radix dependent patterns
              integerPattern = null;
              this.radix = radix;
          }
      }
docs: the default is left untouched.