Gradle - 源代码和测试的 JDK 版本不同

Question

How can I configure Gradle to compile test classes for a different Java version than source classes?

I'm writing a project for Java 1.7, and I want to use Java 1.8 in my tests so I can use Lambda Behave. In Maven this is pretty straightforward , but I can't see how to achieve the same result in Gradle.

Answer 1

Of course, immediately after posting the question I stumble across the answer!

apply plugin: "java"

compileJava {
    sourceCompatibility = 1.7
}

compileTestJava {
    sourceCompatibility = 1.8
}

Answer 2

If you are using Kotlin DSL :

plugins {
    `java`
}

java {
    sourceCompatibility = JavaVersion.VERSION_1_7
    targetCompatibility = JavaVersion.VERSION_1_7
}

tasks {
    compileTestJava {
        sourceCompatibility = JavaVersion.VERSION_1_8.toString()
        targetCompatibility = JavaVersion.VERSION_1_8.toString()
    }
}