Java WeakHashMap - containsValue() Method
The java.util.WeakHashMap.containsValue() method returns true if this map contains one or more keys mapped to the specified value.
Syntax
public boolean containsValue(Object value)
Parameters
value |
Specify the value whose presence in this map is to be tested |
Return Value
Returns true if this map contains one or more keys mapped to the specified value.
Exception
NA.
Example:
In the example below, the java.util.WeakHashMap.containsValue() method is used to check whether the map contains any key which is mapped to the specified value or not.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a weakhashmap
WeakHashMap<Integer, String> MyMap = new WeakHashMap<Integer, String>();
//populating MyMap
MyMap.put(101, "John");
MyMap.put(102, "Marry");
MyMap.put(103, "Kim");
MyMap.put(104, "Jo");
//check for value - "Kim"
System.out.print("Does MyMap contain key(s) mapped to 'Kim'? - ");
System.out.print(MyMap.containsValue("Kim"));
//check for value - "Sam"
System.out.print("\nDoes MyMap contain key(s) mapped to 'Sam'? - ");
System.out.print(MyMap.containsValue("Sam"));
}
}
The output of the above code will be:
Does MyMap contain key(s) mapped to 'Kim'? - true Does MyMap contain key(s) mapped to 'Sam'? - false
❮ Java.util - WeakHashMap
