问题
I'm setting up a series of preferences in my Eclipse (3.5.2) application and I'm having a problem with the FileFieldEditor. I want to allow the user to specify a log file to print output to. Often, this will be a new file. But when I use the file select dialog with FileFieldEditor, it complains that the file doesn't exists ("Value must be an existing file"). Is there a way, without extending the FileFieldEditor class, to suppress this error and have Java create that file if it doesn't exist? Thanks!
回答1:
When I look the source code of org.eclipse.jface.preference.FileFieldEditor, the only solution would be to extend it and write your own version of a FileFieldEditor, with:
- an overwritten
changePressed()method in order to keep the file path even if the file does not exists - an overwritten
checkState()method in order to avoid that error message.
So I do not see a way to avoid that FileFieldEditor extension here.
来源：https://stackoverflow.com/questions/2536362/jface-preference-filefieldeditor-cant-specify-a-new-file