java 中的 java.net.SocketPermission 类
原文:https://www . geesforgeks . org/Java-net-socketpermission-class-in-Java/
java.net.SocketPermisson 类表示您是否有权通过套接字访问网络。SocketPermission 由一个主机和一组操作组成。
类申报:
public final class SocketPermission
extends Permission
implements Serializable
构造函数:
| Constructor | Description | | --- | --- | | ManagementPermission (string name) | This will construct a management permission with the specified name. | | ManagementPermission | This will construct a new management permission object. |公共套接字权限(字符串主机，字符串操作):
用于创建具有指定操作的 SocketPermission 类的新对象。
方法:
| way | Description | | --- | --- | | equals (object obj) | It checks whether two SocketPermission objects are equal. | | GetActions () | It returns the operation | | Hashcode () | of this SocketPermission object in string format. | | Implication (Permission p) | Check whether this SocketPermssion object implies this permission. | | New Permission Collection () | It returns a new Permission Collection object. |示例:
Java
// Java Program to show the usage of
// java.net.SocketPermission Class
import java.io.IOException;
import java.net.SocketPermission;
import java.security.Permission;
import java.security.PermissionCollection;
public class Socket {
public static void main(String args[])
{
try {
// getting permission object
Permission p = getPermission();
// print actions of permission p
System.out.println(p.getActions());
// printing hashcode value of permission p
System.out.println(p.hashCode());
// creating a permissionCollection object and
// printing it
PermissionCollection p1
= p.newPermissionCollection();
System.out.print(p1);
}
catch (Exception e) {
System.err.print("Permission denied");
}
}
public static Permission getPermission()
throws IOException
{
int port = 3000;
String host = "localhost";
return new SocketPermission(host + ":" + port,
"Connect,resolve");
}
}
输出
connect,resolve
-1204607085
java.net.SocketPermissionCollection@30dae81 (
)
版权属于：月萌API www.moonapi.com，转载请注明出处
