cannot call Java Constructor overload

Mon, 03 Nov 2025 18:05:31 +0000

Jetty's BlockingArrayQueue has these two constructors (among a bunch of others):

/**
 * Creates an instance with given initial and max capacities.
 *
 * @param capacity the initial capacity
 * @param growBy the growth factor
 * @param maxCapacity the maximum capacity
 * @deprecated the growth factor isn't used anymore
 */
@Deprecated(since = "12.1.2", forRemoval = true)
public BlockingArrayQueue(int capacity, int growBy, int maxCapacity)
{
    this(capacity, maxCapacity, false);
}

/**
 * Creates an instance with given initial and max capacities.
 *
 * @param capacity the initial capacity
 * @param maxCapacity the maximum capacity
 * @param ignored this parameter is ignored but is needed as there is already a
 *  {@link BlockingArrayQueue#BlockingArrayQueue(int, int) deprecated constructor} that takes two ints.
 */
private BlockingArrayQueue(int capacity, int maxCapacity, boolean ignored)
{
    if (capacity < 0 || maxCapacity < 0 || capacity > maxCapacity)
        throw new IllegalArgumentException();
    _elements = new Object[capacity];
    _maxCapacity = maxCapacity;
}

I'm trying to call the second (the one with the boolean arg in the third position) but the compiler is hell bent on calling the first one.

(BlockingArrayQueue. 10 5 true)
Execution error (ClassCastException) at user/eval7644 (form-init275792826230635171.clj:1).
class java.lang.Boolean cannot be cast to class java.lang.Number (java.lang.Boolean and java.lang.Number are in module java.base of loader 'bootstrap')

(BlockingArrayQueue. 10 5 (boolean true))
Execution error (ClassCastException) at user/eval7648 (form-init275792826230635171.clj:1).
class java.lang.Boolean cannot be cast to class java.lang.Number (java.lang.Boolean and java.lang.Number are in module java.base of loader 'bootstrap')

(BlockingArrayQueue. 10 5 Boolean/TRUE)
Execution error (ClassCastException) at user/eval7652 (form-init275792826230635171.clj:1).
class java.lang.Boolean cannot be cast to class java.lang.Number (java.lang.Boolean and java.lang.Number are in module java.base of loader 'bootstrap')

What am I doing wrong?

Clojure Q&A - Recent questions tagged constructor overload

cannot call Java Constructor overload