Please have a look, its to do with JLists

Question

Hey guys I have been searching for the information online and in books but i cant find anything that works.
I am inserting a name (string) into a JList.
But before I do I need to search the JList to make sure the record dosent already exist in the list.
Becuase if it does, i dont want to enter in the name again.
My problem is searching through the list, becuase JList has no list iterator...and i must use a JList
For this reason I am trying to do it with loops...Will someone please look at my code and try help me. My problem is that: tn does get a value, but tmp never gets the value of that position in the list.
String tn = new String("");
               int j = 0;
               int y =utwoModel.getSize()+1;
               int x = uModel.getSize();
               while (result.next())
                         tn = result.getString("UserResponsible");
                         while(j<y)
                              for(int f = 0;f==j;f++)
                                   String tmp = new String(uModel.elementAt(j).toString());
                                   System.out.println("tmp:"+tmp);
                                   if(tn.compareTo(tmp)== 0)
                                        uModel.addElement(tn);
                                        break;
                              j++;
                              y =utwoModel.getSize();
          

Answer 1

isStringInList is a simple method to check if a String exists in a JList:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class TestList extends JFrame
     JList list;
     public TestList()
          String[] tabs = { "one", "two", "three", "four", "five" };
          list = new JList( tabs );
          getContentPane().add( list );
          System.out.println( "six in list: " + isStringInList( "six" ) );
          System.out.println( "one in list: " + isStringInList( "one" ) );
     public boolean isStringInList(String value)
          for (int i = 0; i < list.getModel().getSize(); i++)
               Object o = list.getModel().getElementAt(i);
               if ( o.toString().equals( value ) )
                    return true;
          return false;
     public static void main(String[] args)
          JFrame frame = new TestList();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setVisible( true );
}