Java.util.PropertyPermission.implies() Java.util.PropertyPermission.hashCode() Java.util.PropertyPermission.newPermission Collection() 描述 所述java.util.PropertyPermission.implies(Permission p)的方法检查PropertyPermission意味着指定的权限。这是通过检查做p是PropertyPermission对象是否,动作p是此对象的操作的一个子集,如果这个对象的名字所暗示的普的行动。 声明 以下是java.util.PropertyPermission.implies()方法的声明 public boolean implies(Permission p) 参数 p - 要检查的Permission对象。 返回值 如果此对象隐含指定的Permission,则此方法返回true。 异常 NA 实例 以下示例显示了java.util.PropertyPermission.implies(Permission)方法的用法。 package com.tutorialspoint; import java.util.PropertyPermission; public class PropertyPermissionDemo { private static PropertyPermission permission; public static void main(String[] args) { // Create property permission object permission = new PropertyPermission("java.*", "read,write"); // Check permissions checkFileReadPermission("java.home"); checkFileWritePermission("java.home"); } private static void checkFileReadPermission(String path) { // Check permission on read action if(permission.implies(new PropertyPermission(path, "read"))) { System.out.println("Has permissions on "+path+" for read"); } } private static void checkFileWritePermission(String path) { // Check permission on read action if(permission.implies(new PropertyPermission(path, "write"))) { System.out.println("Has permissions on "+path+" for write"); } } } 让我们编译并运行上面的程序,这将产生以下结果 Has permissions on java.home for read Has permissions on java.home for write Java.util.PropertyPermission.hashCode() Java.util.PropertyPermission.newPermission Collection()