Java Dictionary - remove() Method
The java.util.Dictionary.remove() method is used to remove the key (and its corresponding value) from this dictionary. This method does nothing if the key is not in this dictionary.
Syntax
public abstract V remove(Object key)
Here, V is the type of value maintained by the container.
Parameters
key |
Specify the key that needs to be removed. |
Return Value
Returns the value to which the key had been mapped in this dictionary, or null if the key did not have a mapping.
Exception
Throws NullPointerException, if the key is null.
Example:
In the example below, the java.util.Dictionary.remove() method is used to remove the key (and its corresponding value) from the given dictionary.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a dictionary
Dictionary<Integer, String> Dict =
new Hashtable<Integer, String>();
//populating dictionary
Dict.put(101, "John");
Dict.put(102, "Marry");
Dict.put(103, "Kim");
Dict.put(104, "Sam");
Dict.put(105, "Jo");
//printing the content of the dictionary
System.out.println("Dict contains: " + Dict);
//removing key 103 and 104
Dict.remove(103);
Dict.remove(104);
//printing the content of the dictionary
System.out.println("Dict contains: " + Dict);
}
}
The output of the above code will be:
Dict contains: {105=Jo, 104=Sam, 103=Kim, 102=Marry, 101=John}
Dict contains: {105=Jo, 102=Marry, 101=John}
❮ Java.util - Dictionary
