NoSuchMethodError - no static method comparing (java/util/Comparator)

Question

I'm sorting a List from java.util, with Gluon, on an Android Device. The application is not getting compiled for iOS (not enough ram) even with 8GB allocated, but that's another issue.

classpath 'org.javafxports:jfxmobile-plugin:1.3.4'

compile 'com.gluonhq:charm:4.3.2'

jfxmobile version = '3.2.4'

This line which causes the crash:

highscoreList.sort(comparing(Highscore::getScore).reversed()); //#89

03-22 09:42:14.709 27312 27337 E AndroidRuntime: FATAL EXCEPTION: JavaFX Application Thread
03-22 09:42:14.709 27312 27337 E AndroidRuntime: Process: com.x.pacman, PID: 27312
03-22 09:42:14.709 27312 27337 E AndroidRuntime: java.lang.NoSuchMethodError: No static method comparing(Ljava/util/function/Function;)Ljava/util/Comparator; in class Ljava/util/Comparator; or its super classes (declaration of 'java.util.Comparator' appears in /system/framework/core-libart.jar)
03-22 09:42:14.709 27312 27337 E AndroidRuntime:        at com.x.pacman.HighscoreUtil.readHighscoreList(HighscoreUtil.java:89)

I began searching and I found this post about NoSuchMethodError, so I tried to do the following, but alas it still crashes, and now I'm out of ideas:

Comparator<Highscore> comparator = new Comparator<Highscore>() {
    @Override
    public int compare(Highscore highscore1, Highscore highscore2) {
        return highscore1.getScore() - highscore2.getScore();
    }
};

highscoreList.sort(comparator); //#97


03-22 11:30:48.836 16547 16570 E AndroidRuntime: java.lang.NoSuchMethodError: No interface method sort(Ljava/util/Comparator;)V in class Ljava/util/List; or its super classes (declaration of 'java.util.List' appears in /system/framework/core-libart.jar)
03-22 11:30:48.836 16547 16570 E AndroidRuntime:        at com.kaufland.pacman.HighscoreUtil.readHighscoreList(HighscoreUtil.java:97)

laalto · Accepted Answer · 2017-03-22 10:41:55Z

5

Both Comparator#comparing() and List#sort(Comparator) were added in API level 24 and your device is probably running a lower API level.

You'll probably have better luck with Collections#sort() that has been there since API level 1.

answered Mar 22, 2017 at 10:41

laalto

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1 Comment

Carsten Hagemann Over a year ago

Collections.sort(highscoreList, (highscore1, highscore2) -> highscore2.getScore() - highscore1.getScore()); solved the issue, thanks!

TmTron · Accepted Answer · 2017-10-09 15:06:19Z

0

Just for reference. I got this error when using http://www.vavr.io/ collections.

I called the function toSortedSet() of a LinkedHashSet. This function tries to call Comparator.naturalOrder() which needs API Level 24.

If you must use a lower API level, just use the overloaded toSortedSet(Comparator) function and pass a suitable comparator.

answered Oct 9, 2017 at 15:06

TmTron

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