The Java Developers Almanac 1.4

e121. Getting the Length and Dimensions of an Array Object

    Object o = new int[1][2][3];
    
    // Get length
    int len = Array.getLength(o);  // 1
    
    // Get dimension
    int dim = getDim(o);           // 3
    
    // If `array' is an array object returns its dimensions; otherwise returns 0
    public static int getDim(Object array) {
        int dim = 0;
        Class cls = array.getClass();
        while (cls.isArray()) {
            dim++;
            cls = cls.getComponentType();
        }
        return dim;
    }

Related Examples

e120. Determining If an Object Is an Array
e122. Getting the Component Type of an Array Object
e123. Creating an Array
e124. Expanding an Array
e125. Getting and Setting the Value of an Element in an Array Object

See also: Constructors    Fields    Methods    Modifiers

© 2002 Addison-Wesley.