Método SimpleBindings remove() en Java con ejemplos

El método remove() de la clase SimpleBindings se usa para eliminar la asignación de esta clave de este objeto SimpleBindings, si está presente. Este método devuelve el valor anterior asociado con la clave especificada, o nulo si no hubo una asignación para la clave. 
Sintaxis: 
 

public Object remove(Object key)

Parámetros: este método acepta una clave de parámetro que es la clave cuya asignación se eliminará del mapa.
Valor devuelto: este método devuelve el valor anterior asociado con la clave especificada, o nulo si no hubo una asignación para la clave.
Excepción: este método arroja las siguientes excepciones: 
 

• NullPointerException : si la clave es nula.
• ClassCastException : si la clave no es String.
• IllegalArgumentException : si la clave está vacía String.

A continuación hay programas para ilustrar el funcionamiento del método remove():
Ejemplo 1: 
 

// Java programs to Illustrate
// the working of remove() method
 
import javax.script.SimpleBindings;
 
public class GFG {
    public static void main(String[] args)
    {
 
        // create simpleBindings object
        SimpleBindings bindings = new SimpleBindings();
 
        // add key value pair using remove()
        bindings.put("key1", "value1");
        bindings.put("key2", "value2");
        bindings.put("key3", "value3");
 
        // print before removing key1 and key2
        System.out.println("before removing key1 and key2");
        System.out.println("Key1: " + bindings.get("key1"));
        System.out.println("Key2: " + bindings.get("key2"));
        System.out.println("Key3: " + bindings.get("key3"));
 
        // remove key1 and key2
        bindings.remove("key1");
        bindings.remove("key2");
 
        // print after removing key1 and key2
        System.out.println("after removing key1 and key2");
        System.out.println("Key1: " + bindings.get("key1"));
        System.out.println("Key2: " + bindings.get("key2"));
        System.out.println("Key3: " + bindings.get("key3"));
    }
}

before removing key1 and key2
Key1: value1
Key2: value2
Key3: value3
after removing key1 and key2
Key1: null
Key2: null
Key3: value3

Ejemplo 2: 
 

// Java programs to Illustrate
// the working of remove() method
 
import javax.script.SimpleBindings;
 
public class GFG {
    public static void main(String[] args)
    {
 
        // create simpleBindings object
        SimpleBindings asiaTeamList
            = new SimpleBindings();
 
        // add team in asiaTeamList using remove()
        asiaTeamList.put("team1", "India");
        asiaTeamList.put("team2", "Sri Lanka");
        asiaTeamList.put("team3", "Pakistan");
        asiaTeamList.put("team4", "Bangladesh");
 
        // print before removing
        System.out.println("before removing team3 and team4");
        System.out.println("Team1: " + asiaTeamList.get("team1"));
        System.out.println("Team2: " + asiaTeamList.get("team2"));
        System.out.println("Team3: " + asiaTeamList.get("team3"));
        System.out.println("Team4: " + asiaTeamList.get("team4"));
 
        // remove team3 and team4
        asiaTeamList.remove("team3");
        asiaTeamList.remove("team4");
 
        // print before removing key1 and key2
        System.out.println("after removing team3 and team4");
        System.out.println("Team1: " + asiaTeamList.get("team1"));
        System.out.println("Team2: " + asiaTeamList.get("team2"));
        System.out.println("Team3: " + asiaTeamList.get("team3"));
        System.out.println("Team4: " + asiaTeamList.get("team4"));
    }
}

before removing team3 and team4
Team1: India
Team2: Sri Lanka
Team3: Pakistan
Team4: Bangladesh
after removing team3 and team4
Team1: India
Team2: Sri Lanka
Team3: null
Team4: null

Referencias: https: //docs.oracle.com/javase/10/docs/api/javax/script/SimpleBindings.html#remove(java.lang.String, java.lang.Object)