Ugly.java

package mypkg;

public class Ugly {
    public Ugly(){}
    public String foo(boolean i) { return "bool: " + i; }
    public String foo(Object o) { return "obj: " + o; }
}

use-ugly.clj

(.foo (mypkg.Ugly.) 5)
;=> "obj: 5"

(.foo (mypkg.Ugly.) true)
;=> "obj: true"

(.foo (mypkg.Ugly.) (boolean true))
;=> "bool: true"


(def u (mypkg.Ugly.))
(.foo u (boolean true))
;=> "obj: true"

(.foo #^mypkg.Ugly u (boolean true))
;=> "bool: true"