title: Using Int In java GUI
body: <p>What can I do to appear a dialog box asking the user to enter the number of students... (the highlighted part)![enter image description here][1]</p>
  
  <pre><code>    JOptionPane.showMessageDialog(null, "Welcome");
      JOptionPane.showMessageDialog(null, "Students mark Input Project");
      JOptionPane.showMessageDialog(null, "In this program the user is going to enter the students name, class and marks.Then the program is going to output several information about each student.");
      JOptionPane.showMessageDialog(null, "Class Information must be entered as the name of the class, the subject and the number of students");
      String nameofclass = JOptionPane.showInputDialog("Enter the name of the class");
      String nameofsubject = JOptionPane.showInputDialog("Enter the subject"); 
      int numberofstudents =Integer.parseInt("Enter the number of students");
      JOptionPane.showMessageDialog(null,"Class Students Information");
      JOptionPane.showMessageDialog(null,"You must enter the name, surname and " + nameofsubject + " marks for each and every student in class "+ nameofclass);
      StLuciaClassrooms theclass =new StLuciaClassrooms(nameofclass, numberofstudents);
      theclass.enterInformation(numberofstudents);//
  </code></pre>