Added in API level 1
Deprecated in API level 33

Group

public interface Group
implements Principal

java.security.acl.Group

This interface was deprecated in API level 33.
This class is deprecated and subject to removal in a future version of Java SE. It has been replaced by java.security.Policy and related classes since 1.2.

This interface is used to represent a group of principals. (A principal represents an entity such as an individual user or a company).

Note that Group extends Principal. Thus, either a Principal or a Group can be passed as an argument to methods containing a Principal parameter. For example, you can add either a Principal or a Group to a Group object by calling the object's addMember method, passing it the Principal or Group.

Summary

Public methods
`abstract boolean`	`addMember(Principal user)` Adds the specified member to the group.
`abstract boolean`	`isMember(Principal member)` Returns true if the passed principal is a member of the group.
`abstract Enumeration<? extends Principal>`	`members()` Returns an enumeration of the members in the group.
`abstract boolean`	`removeMember(Principal user)` Removes the specified member from the group.

Inherited methods

From interface java.security.Principal

`abstract boolean`	`equals(Object another)` Compares this principal to the specified object.
`abstract String`	`getName()` Returns the name of this principal.
`abstract int`	`hashCode()` Returns a hashcode for this principal.
`default boolean`	`implies(Subject subject)` Returns true if the specified subject is implied by this principal.
`abstract String`	`toString()` Returns a string representation of this principal.

Public methods

addMember

Added in API level 1

 public abstract boolean addMember (Principal user)

Adds the specified member to the group.

Parameters
`user`	`Principal`: the principal to add to this group.

Returns
`boolean`	true if the member was successfully added, false if the principal was already a member.

isMember

Added in API level 1

 public abstract boolean isMember (Principal member)

Returns true if the passed principal is a member of the group. This method does a recursive search, so if a principal belongs to a group which is a member of this group, true is returned.

Parameters
`member`	`Principal`: the principal whose membership is to be checked.

Returns
`boolean`	true if the principal is a member of this group, false otherwise.

members

Added in API level 1

 public abstract Enumeration<? extends Principal> members ()

Returns an enumeration of the members in the group. The returned objects can be instances of either Principal or Group (which is a subclass of Principal).

Returns
`Enumeration<? extends Principal>`	an enumeration of the group members.

removeMember

Added in API level 1

 public abstract boolean removeMember (Principal user)

Removes the specified member from the group.

Parameters
`user`	`Principal`: the principal to remove from this group.

Returns
`boolean`	true if the principal was removed, or false if the principal was not a member.