The removeAttribute() method of a SimpleScriptContext class is used to remove an attribute in a given scope and the name of attribute and scope are passed as parameters.
Syntax:
public Object removeAttribute(String name, int scope)
Parameters: This method accepts two parameters:
- name which is the Name of the attribute and
- scope which is the scope in which to remove the attribute.
Return value: This method returns removed value.
Exceptions: This method throws following Exceptions:
- NullPointerException: if the name is null.
- IllegalArgumentException: if the name is empty or if the scope is invalid.
Below programs illustrate the SimpleScriptContext.removeAttribute() method:
Program 1:
// Java program to demonstrate// SimpleScriptContext.removeAttribute() method  import javax.script.ScriptContext;import javax.script.SimpleScriptContext;  public class GFG {    public static void main(String[] args)    {          // create SimpleScriptContext object        SimpleScriptContext simple            = new SimpleScriptContext();          // add some attribute        simple.setAttribute(            "name", "Value",            ScriptContext.ENGINE_SCOPE);          // remove using removeAttribute()        Object removedObject            = simple.removeAttribute(                "name",                ScriptContext.ENGINE_SCOPE);          // print        System.out.println("Removed Object :"                           + removedObject);    }} |
Output:
Removed Object :Value
Program 2:
// Java program to demonstrate// SimpleScriptContext.removeAttribute() method  import javax.script.ScriptContext;import javax.script.SimpleScriptContext;  public class GFG {    public static void main(String[] args)    {          // create SimpleScriptContext object        SimpleScriptContext simple            = new SimpleScriptContext();          // add some attribute        simple.setAttribute("Team1", "India",                            ScriptContext.ENGINE_SCOPE);        simple.setAttribute("Team2", "Japan",                            ScriptContext.ENGINE_SCOPE);        simple.setAttribute("Team3", "Nepal",                            ScriptContext.GLOBAL_SCOPE);          // remove using removeAttribute()        Object remove1            = simple.removeAttribute(                "Team1",                ScriptContext.ENGINE_SCOPE);        Object remove2            = simple.removeAttribute(                "Team2",                ScriptContext.ENGINE_SCOPE);          // print scopes of different teams        System.out.println("Removed : " + remove1);        System.out.println("Removed : " + remove2);    }} |
Output:
Removed : India Removed : Japan
