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From 0.5.2 to 0.6 there have been two incompatible interface changes:
1. You must call Readline.load(ReadlineLibrary lib); before using any
other methods.
If you omit the call to the load()-method, the pure Java fallback
solution is used. Possible values for lib are:
Note that all programs using Gnu-Readline will fall under the GPL,
since Gnu-Readline is GPL software.
If you want to write portable programs and you are not sure if
GnuReadline/Editline is available on all target machines, use code like
try {
} catch (Exception e) {
2. Readline.readline() now additionally throws an IOException
This is due to the fact that starting from 0.6 the pure Java fallback
solution is supported. Using the native libraries, you should never
see this exception, nevertheless you will have to deal with it.