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java – Gradle: How to exclude javax.realtime package from JScience jar dependency (Multiple dex define)

Posted by: admin June 15, 2020 Leave a comment


I’m using Gradle in my Android application an I would like to use the JScience library dependency. I have added the library this way:

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')

    compile 'org.jscience:jscience:4.3.1'

    testCompile group: 'junit', name: 'junit', version: '4.11'

But in the compile time I get the error:

com.android.dex.DexException: Multiple dex files define Ljavax/realtime/MemoryArea;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
    at com.android.dx.command.dexer.Main.run(Main.java:230)
    at com.android.dx.command.dexer.Main.main(Main.java:199)
    at com.android.dx.command.Main.main(Main.java:103)

This is caused because of duplicating javax.realtime packages in project, one is a part of JDK, and the second one is in the Jscience library. I have tried to remove this package from Jscience library this way in Gradle:

sourceSets {
    main {
        java {
            exclude 'javax/realtime/**'

configurations {
    all*.exclude group: 'javax.realtime'

But that didn’t help. So, that package is still exists in dependencies.
enter image description here

Is there any way how I can exclude a package from jar on compile time?

How to&Answers:

In case anybody needed, the problem was in Javolution dependency from JScience library. They both do hava a javax.runtime package. Excluding the Javolution has fixed the issue for me.

compile ('org.jscience:jscience:4.3.1') {
    exclude group: 'org.javolution', module: 'javolution'