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Java Forum / GUI / December 2003JComboBox problem, pse help!
Hi, I've a question concerning JComboBox: In my program a use a JComboBox which is initialized with a list of values at program startup. During runtime, this JComboBox is editable so that a user can enter his own values. I want to do following: After the user entered a valued in the textfield of the JComboBox and a button is pressed, there should be checked whether the JComoBox already contains the entered value. If so, fine! If not, JComboBox.addItem(...entered value...). How can I check whether a JComboBox or its related model already contains a certain value?? Obviously there's no method like JComboBox.contains(Object o) or JComboBox.getModel().contains(Object o)?! Thank you, Tobi > Hi, > [quoted text clipped - 14 lines] > Obviously there's no method like JComboBox.contains(Object o) or > JComboBox.getModel().contains(Object o)?! see javax.swing.DefaultComboBoxModel > see javax.swing.DefaultComboBoxModel Fine, but javax.swing.DefaultComboBoxModel doesn't contain an obvious solution for my problem. There's no method like "boolean contains(Object o)". There must be an easier solution than getting the size of the DefaultComboBoxModel and iterate over all items?!! Tobi > Fine, but javax.swing.DefaultComboBoxModel doesn't contain an obvious > solution for my problem. There's no method like "boolean > contains(Object o)". > There must be an easier solution than getting the size of the > DefaultComboBoxModel and iterate over all items?!! BTW, if 'boolean contains(Object o)' existed it would probably iterate over all items to find the match. Adam > BTW, if 'boolean contains(Object o)' existed > it would probably iterate over all items to find the match. That's exactly what I would need. However, it seems that this method doesn't exist anymore. I use SDK1.4.2 we told you really everything what you need to write following: public boolean contains(DefaultComboboxModel model, Object o) { int size = model.getSize(); for(int i = 0; i < size; i++) { Object obj = model.elementAt(i); if(obj.equals(o)) { return true; } } return false; } -- ____________ http://reader.imagero.com the best java image reader. > > BTW, if 'boolean contains(Object o)' existed > > it would probably iterate over all items to find the match. > > That's exactly what I would need. However, it seems that this method > doesn't exist anymore. I use SDK1.4.2 > we told you really everything what you need to write following: > [quoted text clipped - 8 lines] > return false; > } Thank you very much! Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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