Thanks Sebastian, 1. I am using JDK 1.7/1.8 for both development and deployment in runtime, shall I change 1.5 of source and target to 1.7/1.8?
2. In your example, "for example you can write source code using a JDK 1.6 which is compliant to Java 1.5. However you can also use the StringBuilder class which does not exist in Java 1.5", I think using JDK 1.6 specific feature but using 1.5 complier will fail? No? Please feel free to correct me. regards, Lin On Mon, Mar 30, 2015 at 12:14 AM, Sebastian Oerding < [email protected]> wrote: > source -> The level (JDK version) to which the source code must be > compliant to, for example you can write source code using a JDK 1.6 which > is compliant to Java 1.5. However you can also use the StringBuilder class > which does not exist in Java 1.5 > target -> The class version of the generated class files. The class format > changes with some Java version, for example as some stuff may be added for > performance reason. For example if a new byte code instruction comes up > (like 'invokedynamic') this really makes a change. Or another example (I'm > not really sure about it): As far as I think a stack map has been added > from Java 5 to Java 1.6. This should improve performance and makes subtle > differences when ClassNotFoundException are thrown. You can use a JDK to > compile code for different but lower versions. This way can benefit from > some optimizations which weren't available with the old JDK and are > compatible. > > With regards > Sebastian > > -----Ursprüngliche Nachricht----- > Von: Lin Ma [mailto:[email protected]] > Gesendet: Montag, 30. März 2015 07:46 > An: Maven Users List > Betreff: about source and target in maven-compiler-plugin > > Hello Maven masters, > > For maven-compiler-plugin(a sample below), have a quick question. I read > this document (http://maven.apache.org/plugins/maven-compiler-plugin/), > and confused what means source and target 1.5 here, it seems it is an > internal version number of Maven, independent of JDK? > > <plugin> > <artifactId>maven-compiler-plugin</artifactId> > <version>2.3.2</version> > <configuration> > <source>1.5</source> > <target>1.5</target> > </configuration> > </plugin> > > thanks in advance, > Lin > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] >
