java get keys from tree map
package com.java2novice.treemap; import java.util.Set; import java.util.TreeMap; public class MyTreeMapKeys { public static void main(String a[]){ TreeMap<String, String> hm = new TreeMap<String, String>(); //add key-value pair to TreeMap hm.put("first", "FIRST INSERTED"); hm.put("second", "SECOND INSERTED"); hm.put("third","THIRD INSERTED"); System.out.println(hm); Set<String> keys = hm.keySet(); for(String key: keys){ System.out.println(key); } } }
Source: www.java2novice.com