java 中的 Java . lang . management . managementpermission 类
原文:https://www . geesforgeks . org/Java-lang-management-management permission-class-in-Java/
java.lang.ManagementPermission 类包含确定对系统资源的访问的抽象方法。每个物体都有名字。大多数权限对象也有一些相关联的“动作”，告诉这个权限对象允许哪些活动。
类申报:
public final class ManagementPermission
extends BasicPermission
施工方:
Permission(String name)
公共权限(字符串名称):使用此名称构造新的权限对象。
方法:
| way | describe | | --- | --- | | 检查防护(对象对象) | Used to determine whether the Permission object can be protected (protect access to another object). | | Equal to (object object) | Check whether two permission objects are equal. | | hashCode() | It returns the hash value of this Permission object. | | 获取名（） | 返回该权限的名称。 | | Implicit (permission permission) | Check whether this ManagementPermssion object implies this permission. | | 新权限集合() | It returns a new PermissionCollection object. | | toString() | It returns the string representation of the specified Permission object. |1 . public void checkGuard(Object Object):用于判断该 Permission 对象是否可以被保护(保护对另一个对象的访问)。
Parameters:
object - the object to guard.
Throws:
SecurityException - if the access is denied by checkPermission method.
2 .公共抽象布尔隐含(Permission permission): 检查这个 ManagementPermssion 对象是否隐含这个权限。
Parameters:
permission - the permission to check against.
Returns:
true if this permission is implied by this object, false otherwise.
3 .公共抽象布尔 equals(Object obj): 检查两个 Permission 对象是否相等。
Parameters:
obj - the object to be compared
Returns:
true if both Permission objects are equal, false otherwise.
4.public 抽象 int hashCode(): 它返回这个 Permission 对象的哈希代码值。
Returns:
a hash code value for this object.
5 .公共最终字符串 getName(): 它返回此权限的名称。
Returns:
the name of this Permission.
6 .公共抽象字符串 getActions(): 它以字符串格式返回此权限对象的操作。
Returns:
the actions of this Permission.
7 . public PermissionCollection new PermissionCollection():返回一个新的 PermissionCollection 对象。
Returns:
a new PermissionCollection object
8 .公共字符串 toString(): 它返回指定权限对象的字符串表示形式。
Returns:
string representation of the specified Permission object.
Java 语言(一种计算机语言，尤用于创建网站)
import java.lang.management.ManagementPermission;
import java.security.Permission;
public class GFG {
public static void main(String[] args)
{
// Creating a new ManagementPermission object with
// name control
Permission p = new ManagementPermission("control");
try {
// Printing name of the object
System.out.println("Name: " + p.getName());
// Printing hash value of the object
System.out.println("Hashcode: " + p.hashCode());
// Printing actions of the object
System.out.println("Actions: "
+ p.getActions());
// Converting this managementPermission object
// to new PermissionCollection object
System.out.println(
"As a new PermissionCollection object: "
+ p.newPermissionCollection().toString());
// Checking if new permissionCollection implies
// managementPermission object or not
System.out.println(
"Implies: "
+ p.newPermissionCollection().implies(p));
}
catch (Exception e) {
System.err.println(e.toString());
}
}
}
Output
Name: control
Hashcode: 951543133
Actions:
As a new PermissionCollection object: java.security.BasicPermissionCollection@5b6f7412 (
)
Implies: false
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