I'm a bit new to interoping between java and scala. I want to call a companion object in Scala from Java.
File structure (in current directory):
Board.scala Matching.java lib/scala-library.jar lib/scala-swing_2.11-1.0.1.jar Matching.java
public class Matching{ public void startGame(){ new Board(); } public static void main (String[] args){ Matching newGame = new Matching(); newGame.startGame(); } }Board.scala
import scala.swing._ class Board extends MainFrame { title = "Matching Game" contents = new GridPanel(3, 2) { contents += new Label("Test Label") contents += new Button("Test Button1") contents += new Button("Test Button2") contents += new Button("Test Button3") contents += new CheckBox("Check1") contents += Button("Close") { sys.exit(0) } } visible = true; } object Board { def main(args: Array[String]) { val ui = new Board ui.visible = true } }Command Line:
scalac Board.scala javac Matching.java java -cp /lib/*.jar:. MatchingHowever upon running, the terminal gives:
Exception in thread "main" java.lang.NoClassDefFoundError: scala/swing/MainFrame Solely doing: scalac Board.scala; scala Board works perfectly. Am I forgetting something? I hope I am linking the jars correctly. Thank you!
Edit: Stack Trace Exception
java -cp 'lib/*.jar:.' Matching Exception in thread "main" java.lang.NoClassDefFoundError: scala/swing/MainFrame at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:760) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at Matching.startGame(Matching.java:4) at Matching.main(Matching.java:8) Caused by: java.lang.ClassNotFoundException: scala.swing.MainFrame at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 14 more make: *** [run] Error 1
*is tricky. You probably have to quote it so that the shell does not expand it.java -cp '/lib/*j.jar:.' Matchingstackoverflow.com/a/13609448/14955