HashMap - Getting "Can only iterate over an array or an instance of java.lang.Iterable"
1959
How do I efficiently iterate over each entry in a Java Map?
97642
Initializing an array in Java using the 'advanced' for each loop
113372
Using streams, how can I map the values in a HashMap?
264
How does the Java 'for each' loop work?
74320
Java Hashmap: How to get key from value?
132703
Theoretical limit for number of keys (objects) that can be stored in a HashMap?
5143
Any simple way to explain why I cannot do List animals = new ArrayList()?
150361
Updating Java HashMap key
68500
hashCode() for an array of objects for use in HashMap
31422
javax.servlet.ServletException: javax.servlet.jsp.JspTagException: Don't know how to iterate over supplied "items" in
108487
What basic operations on a Map are permitted while iterating over it?
50653
A 'for' loop to iterate over an enum in Java
21883
Difference between HashSet and HashMap?
33244
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException
72455
Implementing the Iterable interface
42612
Generics, arrays, and the ClassCastException
10035
Java map with values limited by key's type parameter