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/usr/lib/jvm/java-8-oracle/bin/java -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:53182,suspend=y,server=n -javaagent:/opt/idea-IU-139.222.5/plugins/Groovy/lib/agent/gragent.jar -Dfile.encoding=UTF-8 -classpath /opt/idea-IU-139.222.5/lib/idea_rt.jar:/opt/idea-IU-139.222.5/plugins/junit/lib/junit-rt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/plugin.jar:/usr/lib/jvm/java-8-oracle/jre/lib/javaws.jar:/usr/lib/jvm/java-8-oracle/jre/lib/resources.jar:/usr/lib/jvm/java-8-oracle/jre/lib/rt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/deploy.jar:/usr/lib/jvm/java-8-oracle/jre/lib/management-agent.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfxswt.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jsse.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jfr.jar:/usr/lib/jvm/java-8-oracle/jre/lib/jce.jar:/usr/lib/jvm/java-8-oracle/jre/lib/charsets.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/localedata.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/dnsns.jar:/usr/lib/jvm/java-8-oracle/jre/lib/ext/zip

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java.lang.IncompatibleClassChangeError: class de.schauderhaft.degraph.analysis.asm.GraphBuildingClassVisitor has interface org.objectweb.asm.ClassVisitor as super class
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)

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import org.junit.Test;

import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;

import static org.assertj.core.api.Assertions.assertThat;

public class VolatileMethodsSpec {

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class Point {
    private int x;
    private int y;

    public Point(int x, int y) {
      setX(x);
      setY(y);
    }

    public int getX() {

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case class Point(var x: Int, var y: Int)

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public Map<String, List<String>> makeWordMap(
    List<String> sentences) {

  Map<String, List<String>> result =
    new HashMap<String, List<String>>();

  for (String sentence: sentences) {
    for (String word: words(sentence)) {
      List<String> sentencesForWord = result.get(word);
      if (sentencesForWord == null) {

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def makeWordMap(sentences: List[String]):
    Map[String, List[String]] = {

  val initMap = Map.empty[String, List[String]]

  sentences.foldLeft(initMap) { (map1, sentence) =>
    words(sentence).foldLeft(map1) { (map2, word) =>
      map2 +
        (word -> (sentence :: map2.getOrElse(word, Nil)))
    }

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def plotSquares(n, plotter):
  for x in range(0, n + 1):
      plotter.plot(Point(x, x * x))

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Integer getSongLength(
    Artist artist,
    String albumName,
    String songName) {

  Album album = artist.getAlbum(albumName);
  if (album != null) {
    Song song = album.getSong(songName);
    if (song != null) {
      return song.getLength();

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Integer getSongLength(Artist artist, String albumName, String songName){
  return artist
    .getAlbum(albumName)
    .map(a -> a.getSong(songName))
    .map(Song::getTime)
    .orElseThrow(() -> new NoSuchSongException(artist, albumName, songName));
}