Java.util.PropertyPermission.hashCode() Java.util.PropertyPermission.getActions() Java.util.PropertyPermission.implies() 描述 所述java.util.PropertyPermission.hashCode()方法返回该对象的哈希码值。哈希码是根据权限名称确定的。 声明 以下是java.util.PropertyPermission.hashCode()方法的声明 public int hashCode() 参数 NA 返回值 此方法返回此对象的哈希码的整数值。 异常 NA 实例 以下示例显示了java.util.PropertyPermission.hashCode()方法的用法。 package com.tutorialspoint; import java.util.Date; import java.util.Hashtable; import java.util.PropertyPermission; public class PropertyPermissionDemo { private static Hashtable<PropertyPermission, Date> validity; public static void main(String[] args) { // Build property permissions validity collection validity = new Hashtable<PropertyPermission, Date>(); validity.put(new PropertyPermission("java.home.usr", "read"), new Date(2012, 12, 31)); // Get permissions and validity checkFilePermissions("java.home.usr"); } private static void checkFilePermissions(String path) { // Hashcode is calculated by name PropertyPermission permission = new PropertyPermission(path, "read"); System.out.println("Has permissions on "+path+ " for read, Till: "+validity.get(permission)); } } 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.usr for read, Till: Fri Jan 31 00:00:00 IST 3913 Java.util.PropertyPermission.getActions() Java.util.PropertyPermission.implies()