boolean implies(Permission p)

描述 (Description)

java.util.PropertyPermission.implies(Permission p)方法检查此PropertyPermission是否隐含指定的Permission 。 这是通过检查p是PropertyPermission对象来完成的， p动作是该对象的动作的子集，并且该对象的名称是否暗示了p's动作。

声明 (Declaration)

以下是java.util.PropertyPermission.implies()方法的声明public boolean implies(Permission p)

参数 (Parameters)

p - 要检查的Permission对象。

返回值 (Return Value)

如果此对象隐含指定的Permission，则此方法返回true 。

异常 (Exception)

NA

例子 (Example)

以下示例显示了java.util.PropertyPermission.implies(Permission)方法的用法。package com.iowiki;

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