Added Kotlin support

build.gradle

@@ -5,6 +5,7 @@ plugins {
     id 'idea'
     id 'org.openjfx.javafxplugin' version '0.0.13'
     id 'org.beryx.jlink' version '2.25.0'
+    id 'org.jetbrains.kotlin.jvm'
 }
 
 idea {
@@ -56,6 +57,7 @@ dependencies {
     implementation 'org.apache.commons:commons-rng-simple:1.4'
     implementation 'org.apache.commons:commons-lang3:3.4'
     implementation 'commons-io:commons-io:2.11.0'
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
 }
 
 version = '1.0'
@@ -102,3 +104,13 @@ jlink {
         name = 'app'
     }
 }
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+compileTestKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}

settings.gradle

@@ -1,4 +1,8 @@
-/*
+pluginManagement {
+    plugins {
+        id 'org.jetbrains.kotlin.jvm' version '2.0.21'
+    }
+}/*
  * This settings file was generated by the Gradle 'init' task.
  *
  * The settings file is used to specify which projects to include in your build.

src/org/um/feri/ears/algorithms/so/random/RandomSearch.kt

@@ -0,0 +1,46 @@
+package org.um.feri.ears.algorithms.so.random
+
+import org.um.feri.ears.algorithms.AlgorithmInfo
+import org.um.feri.ears.algorithms.Author
+import org.um.feri.ears.algorithms.NumberAlgorithm
+import org.um.feri.ears.problems.DoubleProblem
+import org.um.feri.ears.problems.NumberSolution
+import org.um.feri.ears.problems.StopCriterionException
+import org.um.feri.ears.problems.Task
+
+class RandomSearch : NumberAlgorithm() {
+
+    // needs to extend NumberAlgorithm
+    private var best: NumberSolution<Double?>? = null // used to save global best solution
+
+    fun RandomSearch() {
+        ai = AlgorithmInfo("RW", "Random Walk", "")
+        au = Author("Matej", "matej.crepinsek@um.si")
+    }
+
+    @Throws(StopCriterionException::class)
+    override fun execute(task: Task<NumberSolution<Double?>, DoubleProblem>): NumberSolution<Double?>? { // method which executes the algorithm
+        // the task object holds information about the stopping criterion
+        // and information about the problem (number of dimensions, number of constraints, upper and lower bounds...)
+        var newSolution: NumberSolution<Double?>
+        best =
+            task.randomEvaluatedSolution // generate new random solution (number of evaluations is incremented automatically)
+        // to evaluate a custom solution or an array use task.eval(mySolution)
+        while (!task.isStopCriterion) { // run until the stopping criterion is not reached
+
+            newSolution = task.randomEvaluatedSolution
+            if (task.problem.isFirstBetter(
+                    newSolution,
+                    best
+                )
+            ) { // use method isFirstBetter to check which solution is better (it checks constraints and considers the type of the problem (minimization or maximization))
+                best = newSolution
+            }
+            task.incrementNumberOfIterations() // increase the number of generations for each iteration of the main loop
+        }
+        return best // return the best solution found
+    }
+
+    override fun resetToDefaultsBeforeNewRun() {
+    }
+}

src/org/um/feri/ears/visualization/gp/GPInterface.java

@@ -1,6 +1,5 @@
 package org.um.feri.ears.visualization.gp;
 
-import javafx.scene.input.KeyCode;
 import org.um.feri.ears.algorithms.GPAlgorithm;
 import org.um.feri.ears.algorithms.gp.ElitismGPAlgorithm;
 import org.um.feri.ears.algorithms.gp.GPAlgorithmExecutor;