在这个例子中，我们使用Iterator和Map.Entry迭代TreeMap。
import java.util.TreeMap;import java.util.Set;import java.util.Map;import java.util.Iterator;public class TreeMapExample { public static void main(String[] args) { // Create a TreeMap TreeMap<String, String> treemap = new TreeMap<String, String>(); // Add key-value pairs to the TreeMap treemap.put("Key1","Item1"); treemap.put("Key2","Item2"); treemap.put("Key3","Item3"); treemap.put("Key4","Item4"); treemap.put("Key5","Item5"); // Get a set of the entries Set set = treemap.entrySet(); // Get an iterator Iterator it = set.iterator(); // Display elements while(it.hasNext()) { Map.Entry me = (Map.Entry)it.next(); System.out.print("Key is: "+me.getKey() + " & "); System.out.println("Value is: "+me.getValue()); } }}
输出：
Key is: Key1 & Value is: Item1Key is: Key2 & Value is: Item2Key is: Key3 & Value is: Item3Key is: Key4 & Value is: Item4Key is: Key5 & Value is: Item5
