Displaying the Contents of a Map over Iterator
I Am Trying to Display the Map I Have Created Using the Iterator. the Code I Am Using Is: Private Void displayMap(Map Dg) { Iterator It = Dg. entrySet()...
I am trying to display the map i have created using the Iterator.
The code I am using is:
private void displayMap(Map<String, MyGroup> dg) {
Iterator it = dg.entrySet().iterator(); //line 1
while (it.hasNext()) {
Map.Entry pair = (Map.Entry)it.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
it.remove();
}
}
Class MyGroup and it has two fields in it, named id and name.
I want to display these two values against the pair.getValue().
The problem here is Line 1 never gets executed nor it throws any exception.
Please Help.
PS: I have tried every method on this link.
1 Answer
Map<String, MyGroup> map = new HashMap<String, MyGroup>();
for (Map.Entry<String, MyGroup> entry : map.entrySet()) {
System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
}
using iterator
Map<String, MyGroup> map = new HashMap<String, MyGroup>();
Iterator<Map.Entry<String, MyGroup>> entries = map.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry<String, MyGroup> entry = entries.next();
System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());
}
For more iteration information see this link
James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.
