打印首选项节点的子代 [英] Printing children of a preference node

问题描述

我要打印首选项节点的子代.我编写了以下代码:

I want to print the children of a preference node. I've wrote the following code:

private void printOracleDefaults() {
    Preferences p = Preferences.userRoot();
    p = p.node("/HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE");
    try {
       for(String s : p.childrenNames())
          System.out.println(s);
    } catch (BackingStoreException e) {
       //bla bla..
       e.printStackTrace();
    }
}

尽管ORACLE有子级，但上面的方法不会打印任何内容:

The method above doesn't print anything, although ORACLE has children:

我在做什么错或误解?

更新:

我写了p = p.node("HKEY_LOCAL_MACHINE/SOFTWARE");

代替

p = p.node("HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE");

当我打印p的孩子时，我得到了:ORACLE！这怎么可能?那其他孩子呢? (有..我通过注册表编辑器看到了它们)

and when I printed the childrens of p I got: ORACLE! How is it possible? What about all other childrens? (There are.. I saw them through the Registry Editor)

看起来它存储的是先前存储在/SOFTWARE旁边的先前运行中的先前值.

Looks like it was storing the previous values from the previous runs that were attached next to /SOFTWARE.

推荐答案

我认为您应该在这里使用Preferences.systemRoot()而不是Preferences.userRoot().后者映射到HKEY_CURRENT_USER.

I think you should use Preferences.systemRoot() instead of Preferences.userRoot() here. The latter maps to HKEY_CURRENT_USER.

在Windows中，路径应为HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE，然后像HKEY_LOCAL_MACHINE\\SOFTWARE\\ORACLE一样将其转义到字符串中.

With Windows, the path should be HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE and then you escape it inside the String like HKEY_LOCAL_MACHINE\\SOFTWARE\\ORACLE.

注意:我自己还没有尝试过.

Note: I've not tried this myself.

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