in class file ,when security Manger is not null.function canRead()return true or false?

[junzhang1983]

3ks

 

[junzhang1983]

when file is not exist on disk, canRead should return what ? false or throw SecurityException?

 

[Thomas Fritsch]

when you know where the API docs are, the documentation of canRead will
tell you!

 

[junzhang1983]

java apl explain canRead like below:

public boolean canRead()

Tests whether the application can read the file denoted by this
abstract pathname.

Returns:
true if and only if the file specified by this abstract
pathname exists and can be read by the application; false otherwise
Throws:
SecurityException - If a security manager exists and its
SecurityManager.checkRead(java.lang.String) method denies read access
to the file

but still don't know in what condition will return false?and in what
condition will throw SecurityException?