What is the output of below code?

java.util.Map map $=$

new java.util.HashMap$()$;

map.put $(4,100)$ ;

map. put $(2,200)$;

map.put $(6,300)$;

map. put $(1,400)$;

map. put $(5,500)$;

map. put $(3,600)$;

map.putAll $($map$)$ ;

System. out.println $($map$)$ ;