tp2

TP2/build.sbt

+name := "scala2020"
+
+version := "0.1"
+
+scalaVersion := "2.13.1"

TP2/src/main/scala/ch/hepia/tp2/Stack.scala

+package ch.hepia.tp2
+
+import java.util._
+
+class Stack[A] {
+
+    private val content: List[A] = new ArrayList[A]
+
+    //Return true if Stack is Empty
+    def isEmpty: Boolean = content.isEmpty
+
+    //return size of stack
+    def size: Int = content.size
+
+    //stack an element on the stack
+    def push(a: A): Unit = content.add(0, a)
+
+    //Unstack an element and return it
+    def pop: A = {
+        if(this.size == 0 ) {
+            throw new NoSuchElementException
+        }else{
+            content.remove(0)
+        }
+    }
+
+    //Swap the 2 first elements of the stack, do nothing if less than 1 element
+    def swap: Unit = {
+        if(this.size > 1) {
+            this.push(content.remove(1))
+        }
+    }
+
+    override def toString: String = {
+        val sb: StringBuilder = new StringBuilder
+        sb.append("[")
+        this.content.forEach((e) => sb.append(e).append(", "))
+        sb.append("]")
+        sb.toString
+    }
+
+}

src/main/scala/ch/hepia/tp2/Stack.scala

+package ch.hepia.tp2
+
+class Stack {
+
+}