The Java Tutorials have been written for JDK 8.Java教程是为JDK 8编写的。Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.本页中描述的示例和实践没有利用后续版本中引入的改进，并且可能使用不再可用的技术。See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.有关Java SE 9及其后续版本中更新的语言特性的摘要，请参阅Java语言更改。
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.有关所有JDK版本的新功能、增强功能以及已删除或不推荐的选项的信息，请参阅JDK发行说明。
The following table shows the default values and behaviors of the new properties in the JDK.
| Values of access properties | Default Value | Set FSP(a) | jaxp.properties | system property | API property |
|---|---|---|---|---|---|
| 7u40 | all | no change | override | override | override |
| JDK8 | all | change to "" | override | override | override |
(a) Set FSP means setting FEATURE_SECURE_PROCESSING explicitly using JAXP factories' setFeature method.
(b) The only behavioral difference between 7u40 and JDK8 is that setting FSP will not change accessExternal* properties in 7u40, but will set the value to an empty string in JDK8. Setting FSP is considered opt-in in JDK8.
(c) The order from left to right in the table reflects the overriding order. For example, if an accessExternal property is set through the API, it overrides any that may have been set by other means.