The remove() method of SimpleBindings class is used to remove the mapping for this key from this SimpleBindings object if it is present. This method returns the previous value associated with the specified key, or null if there was no mapping for key.
Syntax:
public Object remove(Object key)
Parameters: This method accepts one parameter key which is key whose mapping is to be removed from the map.
Return Value: This method returns the previous value associated with the specified key, or null if there was no mapping for key.
Exception: This method throws following exceptions:
- NullPointerException: if key is null.
- ClassCastException: if key is not String.
- IllegalArgumentException: if key is empty String.
Below are programs to Illustrate the working of remove() method:
Example 1:
Java
// Java programs to Illustrate// the working of remove() methodimport 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")); }} |
Output:
before removing key1 and key2 Key1: value1 Key2: value2 Key3: value3 after removing key1 and key2 Key1: null Key2: null Key3: value3
Example 2:
Java
// Java programs to Illustrate// the working of remove() methodimport 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")); }} |
Output:
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
