Method set

classpath/java/lang/reflect/Array.java:48–95

(Object array, int index, Object value)

  }

  public static void set(Object array, int index, Object value) {
    String className = array.getClass().getName();
    if (! className.startsWith("[")) {
      throw new IllegalArgumentException();
    }

    switch (className.charAt(1)) {
    case 'B':
      ((byte[]) array)[index] = (Byte) value;
      break;
    case 'C':
      ((char[]) array)[index] = (Character) value;
      break;
    case 'D':
      ((double[]) array)[index] = (Double) value;
      break;
    case 'F':
      ((float[]) array)[index] = (Float) value;
      break;
    case 'I':
      ((int[]) array)[index] = (Integer) value;
      break;
    case 'J':
      ((long[]) array)[index] = (Long) value;
      break;
    case 'S':
      ((short[]) array)[index] = (Short) value;
      break;
    case 'Z':
      ((boolean[]) array)[index] = (Boolean) value;
      break;
    case 'L':
    case '[':
      if (value == null
          || array.getClass().getComponentType().isInstance(value))
      {
        ((Object[]) array)[index] = value;
      } else {
        throw new IllegalArgumentException
          ("need " + array.getClass().getComponentType() +
           ", got " + value.getClass().getName());
      }
      break;

    default:
      throw new Error();
    }    
  }

  public static native int getLength(Object array);