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import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
public class TreeMapExample {
public static void main(String[] args) {
Map<Integer, String> map = new TreeMap<Integer, String>();
// Add Items to the TreeMap
map.put(new Integer(1), "One");
map.put(new Integer(2), "Two");
map.put(new Integer(3), "Three");
map.put(new Integer(4), "Four");
map.put(new Integer(5), "Five");
map.put(new Integer(6), "Six");
map.put(new Integer(7), "Seven");
map.put(new Integer(8), "Eight");
map.put(new Integer(9), "Nine");
map.put(new Integer(10), "Ten");
// Use iterator to display the keys and associated values
System.out.println("Map Values Before: ");
Set keys = map.keySet();
for (Iterator i = keys.iterator(); i.hasNext();) {
Integer key = (Integer) i.next();
String value = (String) map.get(key);
System.out.println(key + " = " + value);
}
// Remove the entry with key 6
System.out.println("\nRemove element with key 6");
map.remove(new Integer(6));
// Use iterator to display the keys and associated values
System.out.println("\nMap Values After: ");
keys = map.keySet();
for (Iterator i = keys.iterator(); i.hasNext();) {
Integer key = (Integer) i.next();
String value = (String) map.get(key);
System.out.println(key + " = " + value);
}
}
}
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