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So we saw in the last video that

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we could quickly configure IntelliJ IDEA to use

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JDK 8 within the IDE itself.

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A better way to do this stuff, rather than setting it

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in IntelliJ IDEA directly is to go to the

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pom.xml file and set in Maven itself, in

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other words in the pom model itself. So to

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do this we just need to configure the compiler plugin.

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So you can do this if you have a build section

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in the pom file

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then, within here you can configure the different

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plugins that are used, for the plugin section.

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And here we can configure an individual plugin.

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So the plugin I'm going to configure

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as a groupId of org.apache.maven.plugins.

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This is basically where all the default

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out of the box Maven plugins reside.

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That's the groupId for those the artifactsId

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is the Maven compiler plugin.

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And you can see here IDEA's giving us all the artifacts

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that live within that groupId, which is very useful.

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So Maven compiler plugin is the compiler one,

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version 3.6.1.

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And then finally we can put in a configuration block.

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And this is really the reason why we've done

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this, because within here we can give direct property

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values to the compiler plugin itself, and the

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properties we're going to use as source 1.8.

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This means that it will accept 1.8 level source code.

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In other words we can use all the Java 8

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new features like streams

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and then target of the same.

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So this defines basically what the

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output is going to be. In other words the byte code.

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So the first one the source property defines the level

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for the source code and the second one the target

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one defines the level for the actual Byte code.

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So that's another way of being able to do that.

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And to be honest it's a much better way than

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configuring it by hand in the IDE itself because number

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one it makes things portable since you don't normally

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check in the configuration files for an IDE.

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So for example you should never normally see a

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IDEA folder checked into a project in the case

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of IDEA or .classpath and .project file.

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In the case of Eclipse, those should always

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be generated by the IDE when you import

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the project into the IDE itself.

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That's the first reason.

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And the second reason is that it then makes

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it possible from a build perspective as well.

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So in another words when I build within the IDE

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or when I build the command line, then the

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same JDK level settings are going to take effect.

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That's the reason for that.

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Anyway, now that we've done that, we know

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we've got portable builds, we can move on.