import java.awt.Graphics import java.awt.image.BufferedImage import javax.swing.JComponent import javax.swing.JFrame val frame: JFrame = new JFrame("Fractal") frame.setSize(640,320) frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE) frame.setVisible(true)

Results in:

Error[9,39]: value DISPOSE_ON_CLOSE is not a member of object javax.swing.JFrame

I realise Kojo isn't necessarily meant to be used in this way, but for my better understanding, I am curious why DISPOSE_ON_CLOSE doesn't show up!

Following "Expressions" section under the Scala tutorial, which is under Kojo's Help menu and ran the expression 3.5*9.4+7/5, which returned 33.9, I've repeated tried this expression using both Windows 7 calculator and Google search and the number I am getting from them is 34.3, which means either Kojo has a problem or the world as a problem. I have also tried just running it like this: println((3.5*9.4)+(7/5)), but again the result Kojo returns is 33.9. Perhaps I do not understand how the "order of operation" Kojo is performing, but I've tried it several ways got different results of course, but never got 33.9. Please look into this issue and let me know whether I am not understanding something or if there is a bug in Kojo. I really think Kojo is a great system overall, but if it's a calculation bug then it needs to be address. Thanks and have a great day!

On the console, I see this:

./kojo
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar
[INFO] Running first Kojo instance with args: []
[INFO] Java Home: /opt/jre1.8.0_45
Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=32m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
[INFO] Logging has been redirected to: /home/daddy/.kojo/lite/log/kojo0.log

Exception: java.lang.NullPointerException thrown from the UncaughtExceptionHandler in thread "AWT-EventQueue-0"

The above is for the Oracle JRE for Java 8, but there are only slight variations with other versions. The NPE at the bottom appears in all cases, and I suspect that it's at the root of the problem.

In the log, I see only a listing of the system properties, followed by this, which mirrors what I saw in the console:

[Sat Jul 11 22:33:53 EDT 2015, CodeExecutionSupport] SEVERE: stderr> Exception in thread "AWT-EventQueue-0"
[Sat Jul 11 22:33:53 EDT 2015, CodeExecutionSupport] SEVERE: stderr> Exception in thread "AWT-EventQueue-0"

Since there is no stack trace attached to the exception, I can't even venture a guess as to what the problem could be.

we have a Windows Terminal Server at Beuth University of Applied Sciences. Students log into it from client computers.
Only the first one starting Kojo by the Start menu succeeds. For all subsequent trials we only see a second-lasting hourglass, which diappears without a message. After exiting the first Kojo instance, another instance can be started.
As we do not know this behavior from other Java applications we suppose the little kojo.exe to be guilty.
In the Kojo2\bin directory there is a shell script for starting Kojo. It collects all .jar files from Kojo2/lib.
Do you have an equivalent script as Windows batch file for trying a workaround?
Or how could we diagnose, why only the first Kojo instance can start?

Thank you very much,
Christoph

import scala.io._ //> import scala.io._
val in = Source.fromFile("C:\\linuxwords.txt") //> in: scala.io.BufferedSource = non-empty iterator
val words = in.getLines //> words: Iterator[String] = non-empty iterator
words.length //> res72: Int = 45374
val wordList = words.toList //> wordList: List[String] = List()
words.length //> res73: Int = 0

Thanks! Matteo

import Staging._ import Staging.{screenSize, dot} reset screenSize(200, 200) println(screenWidth) background(black) class ColorGen { var map = Array.ofDim[Int](200, 200) map(0)(0) = random(256) for (i <- 1 until 200) { map(i)(0) = if (random(5) == 0) random(256) else map(i-1)(0) map(0)(i) = if (random(5) == 0) random(256) else map(0)(i-1) } def get(i: Int, j: Int): Int = { if (map(i)(j) == 0) { val d = random(3) + 1 map(i)(j) = if (random(1000) == 0) random(256) else {get((200+i-(d&1)) % 200, (200+j-(d >> 1)) % 200)} } map(i)(j) } } val r = new ColorGen val g = new ColorGen val b = new ColorGen for (x <- 0 until 200; y <- 0 until 200) { stroke(color(r.get(x,y), g.get(x,y), b.get(x,y))) dot(x, y) } println("DONE")

I then did the same sample in Processing and found it capable of repainting a 200x200 square over thirty times per second.

Does this happen because Kojo is inherently slower, or because it is not suitable for pixel graphics?

I'm looking to perform an unattended installation of Kojo is this possible?
I've tried 'java -jar install.jar -options install.properties', but aside from INSTALL_PATH I have no clue as to what I'm supposed to enter in the properties file, if this is even an option.

/chris

println("output")
var myInt:Int = 1
myInt * 2

on the output pane it will only show "output", for the results I have to run the script as a worksheet. I'd like the Output pane to display also

myInt: Int = 1
res1: Int = 2

Cheers, M

Ps: I like Kojo a lot!!!

In particular, I don't really need to change the equal sign assignment operator - I just want to put in another operator that does the same thing. Perhaps something like the old Pascal-style ":=" assignment operator.

It seems like this shouldn't be too hard but I really don't trust my programming skills to be able to do this without potentially causing some major problems somewhere.

How easy would this be and how might I go about doing this?

Any help would be appreciated.
Thanks & Best Regards,
NN