jcombobox

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NullPointerException when accessing another class in ActionListener

I am trying to add an ActionListener to a JButton in the standard way: outside of the method I have private Actions listener;and inside of the method I have put[详细]

2023-04-02 20:07 分类：问答
Is it possible to have an autocomplete using jtextfield and a Jlist?

I want to create an auto-complete program in java which should provide a list of suggestions instantly when the user types a character/String inside a JTextfield. The problem is that I am confused on[详细]

2023-04-01 09:51 分类：问答
Multiple JComboBox

Ok, t开发者_JS百科here is two jcombobox displayed one is a list of cities a flight leaves from and another is a list of cities a flight goes to when a user selects an option from both combo boxes I wa[详细]

2023-03-31 00:21 分类：问答
can't remove first element from jcombobox

I cannot remove the first element from jcombobox. my code is as follows, JComboBox cBox= cBox= new JComboBox();[详细]

2023-03-30 03:20 分类：问答
Using JComboBox to setColor of plot drawn

I have created a simulation that performs a number of calculations and then stores a point consisting of an x and y coordinate into a Point Array List.[详细]

2023-03-29 17:27 分类：问答
Suggestion on how to debug ComboBoxModel

in my project I\'ve several JComboBox with their custom models. Basically they are used to show values of some JTables column (therefore I decided to implement them on the relative[详细]

2023-03-28 18:09 分类：问答
How can I copy lines from a text file into a JComboBox?

I\'m trying to copy each line of a text file into a jcomboBox, but it displays only the first line of the text file in the jcomboBox...I don\'t understand why.[详细]

2023-03-28 08:45 分类：问答
Why isn't getSelectedItem() on JComboBox generic?

JCombobox in Java 7 has been updated to use generics - I always thought it was a bit of an oversight that it didn\'t already so I was pleased to see this change.[详细]

2023-03-27 15:34 分类：问答
How to make JRadioButtons change properties (JFrame)?

How can I make my JRadioButton enable/di开发者_开发知识库sable a JComboBox in JFrame?if(radioButton.isSelected())[详细]

2023-03-26 20:34 分类：问答
Need to add JCheckBox In JTable Dynamically

I have two JTable. There are certain number of records in one JTable. Once the first JTable is loaded I want to load equal number of JCheckbox to be created in thesecond table.[详细]

2023-03-26 16:41 分类：问答