VisualVM Object Query for HashMap that prints their key->value entries.

gistfile1.txt

select map(heap.objects('com.barchart.osgi.factory.api.util.Props'),
    function (it) {
        
        var res = '';
        
        var tables = toArray(it.table);
        
            for(i = 0;i< tables.length;i++) {
                var e = tables[i];
                
                while(e != null) {
                    
                    if(e.key != null) {
                        res += e.key.toString();
                    }else {
                        res += 'nullKey';
                    }
                    
                    if(e.value!= null) {
                        res += " -> " + toHtml(e.value.toString());
                    }else {
                        res += " -> null";
                    }
                    
                    res += "<br/>";
                    e = e.next;
               }
            }

        return res + "<br>";
    })