java - Customize the way TreeSet prints Map.Entry values -

i have treeset containing map.entry<string, double> values , when try use iterator iterate on structure , print key-value pairs, standard output looks like:

tolkien=40.25 jkrowling=35.5 obowden=14.0 

however use custom format output , replace = sign -> like:

tolkien -> 40.25, jkrowling -> 35.5, obowden -> 14.0 

this code now:

iterator iterator;. iterator = lib.getsortedbooks().iterator();  while (iterator.hasnext()) {     system.out.printf(iterator.next() + " "); } 

which best way properly format output?

printing methods in system.out use tostring() internally, when call tostring() same thing see in output. replace equals sign arrow.

system.out.printf(iterator.next().tostring().replace("=", " -> ") + " "); 

a more elegant approach (actually right way since map.entry makes no promise tostring() format):

map.entry<k, v> entry = iterator.next(); system.out.printf(entry.getkey() + " -> " + entry.getvalue() + " "); 

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