JOptionPane.showMessageDialog() help

Question

I am trying to do a search on names inwhich i input into a file and then show them on a joptionpane. My problem is that I can't get it to run b/c it says that i have incompatable types. Please help if at all possible.
String name, custid, num, result;
int id, element;
public void search(){
num = JOptionPane.showInputDialog("Enter Customer ID:");
id = Integer.parseInt(num);
name = tree.lookUp(id);
result = JOptionPane.showMessageDialog(null,new JTextArea(name));
}

Answer 1

result = JOptionPane.showMessageDialog(null,new JTextArea(name));your wrong if the JOptionPane.showMessageDialog()'return type is void,it means it hasn't a return value and you want to put a value to "result",you should use like this
JOptionPane.showMessageDialog(null,new JTextArea(name));