Java TreeMap FirstKey LastKey Example

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import java.util.TreeMap;

public class JavaTreeMapFirstLastKey {

	public static void main(String[] args) {

		TreeMap treeMap = new TreeMap();

		treeMap.put("1", "One");
		treeMap.put("3", "Three");
		treeMap.put("2", "Two");
		treeMap.put("5", "Five");
		treeMap.put("4", "Four");

		System.out.println("Lowest key Stored in Java TreeMap is : " + treeMap.firstKey());

		System.out.println("Highest key Stored in Java TreeMap is : " + treeMap.lastKey());

	}
}
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