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
