java 中的 Java . lang . reflect . reflect permission 类
原文:https://www . geesforgeks . org/Java-lang-reflect-reflection permission-class-in-Java/
ReflectPermission 类扩展了 BasicPermission 类。这是一个“命名”权限，即它包含一个名称，但不包含任何操作。如果需要，它可以在基本权限之上实现操作。它用于获取关于构造函数行为的信息。
| **constructor** | **Description** | | --- | --- | | ReflectPermission(字符串名称) | Used to create a reflect permission with the specified name. | | ReflectPermission (string name, string action) | Used to create a reflect permission with the specified name and action. |方法继承自 java.security.BasicPermission 类:
| **Method** | **Description** | | --- | --- | | 等于(对象对象) | It checks whether two BasicPermission objects are equal. | | 【定语】 | It returns the operation in a string format, which is currently an empty string because there is no operation in ReflectPermission. | | hashCode() | It returns the hash code value of this object. | | 隐含(许可权限) | Check whether the given permission is implied by the object. | | 新权限集合() | It returns a new PermissionCollection object. |下面是给定类的示例/用法:
Java 语言(一种计算机语言，尤用于创建网站)
// Use of java.lang.reflect.ReflectPermission Class in Java
import java.lang.reflect.ReflectPermission;
class GFG {
public static void main(String[] args)
{
if (canAccessPrivateMethods()) {
System.out.println("Permission granted");
}
else {
System.out.println("Permission not granted");
}
}
static boolean canAccessPrivateMethods()
{
try {
SecurityManager securityManager
= System.getSecurityManager();
if (null != securityManager) {
securityManager.checkPermission(
new ReflectPermission(
"suppressAccessChecks"));
}
}
catch (SecurityException e) {
return false;
}
return true;
}
}
Output
Permission not granted
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