/*
Check if a particular key exists in Java TreeMap example
This Java Example shows how to check if TreeMap object contains a particular
key using containsKey method of TreeMap class.
*/
import java.util.TreeMap;
public class CheckKeyOfTreeMapExample {
public static void main(String[] args) {
//create TreeMap object
TreeMap treeMap = new TreeMap();
//add key value pairs to TreeMap
treeMap.put("1","One");
treeMap.put("2","Two");
treeMap.put("3","Three");
/*
To check whether a particular key exists in TreeMap use
boolean containsKey(Object key) method of TreeMap class.
It returns true if the TreeMap contains mapping for specified key
otherwise false.
*/
boolean blnExists = treeMap.containsKey("1");
System.out.println("1 exists in TreeMap ? : " + blnExists);
}
}
/*
Output would be
1 exists in TreeMap ? : true
*/
