title: Attempting to initialize a Scala created class in Java
body: <p>I'm attempting to learn Scala so I have decided to implement datastructures with it. I've begun with the Stack. I have created the following Stack class.</p>
  
  <pre><code>class Stack[A : Manifest]() {
  
    var length:Int = -1
    var data = new Array[A](100)
  
    /**
     * Returns the size of the Stack.
    * @return the size of the stack
    */
   def size = {length} 
  
    /**
     * Returns the top element of the Stack without
     * removing it.
     * @return Stacks top element (not removed)
     */
    def peek[A] = {data(length)}
  
    /**
     * Informs the developer if the Stack is empty.
     * @return returns true if it is empty else false.
     */
    def isEmpty = {if(length==0)true else false}
  
    /**
     * Pushes the specified element onto the Stack.
     * @param The element to be pushed onto the Stack
     */
    def push(i: A){
      if(length+1 == data.size) reSize
      length+=1
      data(length) = i;
    }
  
    /**
     * Pops the top element off of the Stack.
     * @return the pop'd element.
     */
    def pop[A] = {
      length-=1
      data(length)
    }
  
    /**
     * Increases the size of the Stack by 100 indexes.
     */
    private def reSize{
      val oldData = data;
      data = new Array[A](length+101)
      for(i&lt;-0 until length)data(i)=oldData(i)
     }
  }
  </code></pre>
  
  <p>I Then attempt to initialize this class in my Java class using the following</p>
  
  <pre><code>Stack&lt;Integer&gt; stack = new Stack&lt;Integer&gt;();
  </code></pre>
  
  <p>However, I'm told that the constructor doesn't exist and that I should add an argument to match Manifest. Why does this happen and how can I fix it?</p>