This is an example of how to check a value existence in a TreeMap in Java. Checking if a value exists in a TreeMap implies that you should:
- Create a new TreeMap.
- Populate the map with elements, with
put(K key, V value)API method of TreeMap. - Invoke
containsValue(Object value)API method of TreeMap. The method returns true if this map maps one or more keys to the specified value and false otherwise.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.TreeMap;
public class CheckValueTreeMap {
public static void main(String[] args) {
// Create a TreeMap and populate it with elements
TreeMap treeMap = new TreeMap();
treeMap.put("key_1","element_1");
treeMap.put("key_2","element_2");
treeMap.put("key_3","element_3");
// boolean containsValue(Object key) returns true if the value is mapped to one or more keys otherwise false.
boolean exists = treeMap.containsValue("element_2");
System.out.println("element_2 exists in TreeMap ? : " + exists);
}
}
Output:
element_2 exists in TreeMap ? : true
This was an example of how to check a value existence in a TreeMap in Java.
