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Security Features in Java SE
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Quick Tour of Controlling Applications
Grant the Required Permissions
To grant the GetProps application permission to
read the "user.home" and "java.home"
property values, you must create a policy entry granting those permissions.
Choose the Add Policy Entry button
in the main Policy Tool window.
This brings up the Policy Entry dialog box,
as shown in the following figure.

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Type the following file URL
into the CodeBase text box to indicate that you are going to be granting a
permission to code from the specified directory, which is the directory in which
GetProps.class is stored.
file:/C:/Test/
(Note, this is a URL and thus must always have
slashes, not backslashes.)
Leave the SignedBy text box blank, since you aren't requiring the code
to be signed.
To add permission to read the "user.home" property value,
choose the Add Permission button.
This brings up the Permissions dialog box.

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Do the following.
- Choose Property Permission from the Permission drop-down list. The
complete permission type name (
java.util.PropertyPermission)
now appears in the text box to the right of the drop-down list.
- Type the following in the text box to the right of the list labeled
Target Name to specify the
"user.home" property:
user.home
- Specify permission to read this property by selecting the read
option from the
Actions drop-down list.
Now the Permissions dialog box looks like the following.

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Choose the
OK button. The new permission appears in a line
in the policy entry window.

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To add permission to read the "java.home" property value,
choose the Add Permission button again.
In the Permissions dialog box, do the following:
- Choose Property Permission from the Permission drop-down list.
- Type the following in the text box to the right of the list labeled
Target Name to specify the
"java.home" property:
java.home
- Specify permission to read this property by choosing the read
option from the
Actions drop-down list.
Now the Permissions dialog box looks like the following.

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Choose the
OK button. The new permission and the previously added
permission appear in lines
in the policy entry window,
as shown in the following figure.

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You are now done specifying this policy entry, so choose the Done
button in the Policy Entry dialog. The Policy Tool window now includes a line
representing the new policy entry, showing the
CodeBase value.

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