Mutable - All mutable all the time

public static final class Mutable<T> {
        private T mutable;
        /**
         * Constructor.
         * @param m
         */
        public Mutable(final T m) {
            this.mutable = m;
        }
        /**
         * Set the mutable.
         * @param val
         * @return
         */
        public synchronized T set(final T val) {
            this.mutable = val;
            return mutable;
        }        
        public synchronized T get() {
            return mutable;
        }
        @Override
        public String toString() {
            return String.valueOf(mutable);
        }
    }