title: Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "
body: <p>I am very to new to Java programming and I am taking a class based on Java. I am currently doing this coffee project which is based on boolean and RadioButtons. I believe I am almost done with it except I get this error message on the console. If there is any other mistakes please let me know so I can fix it!</p>
  
  <pre><code>Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "
  at java.lang.NumberFormatException.forInputString(Unknown Source)
  at java.lang.Integer.parseInt(Unknown Source)
  at java.lang.Integer.parseInt(Unknown Source)
  </code></pre>
  
  <hr>
  
  <pre><code>    public void purchase()
      {
          //local variables
          String  quantityString, buttonString, nameString, coffeeType;
  
          float subTotalFloat, priceFloat, taxFloat, grandTotalFloat;
          int quantityInteger;
  
          //Format the values to currency format
          DecimalFormat valueDecimalFormat = new DecimalFormat("$#0.00");
  
          //retrieve the input from the  user
          nameString = nameTextField.getText();
          quantityString = quantityTextField.getText();
          buttonString = coffeeType ();
  
          //change data types
          quantityInteger = Integer.parseInt(quantityString);
          ...
      }
  </code></pre>