Get combobox value in Java swing

Question

I need to get the integer value of the combobox in Swing   I have set an integer value as id for the combobox I tried combobox getSelectedItem   and combobox getSelectedIndex   but it cant get the int value   Below is my code   CommonBean commonBean   new CommonBean commonResponse getCommonBean   length 1                     for int i 0 i lt commonResponse getCommonBean   length i                            commonBean i    new CommonBean  --Please select a project--   0                commonBean i 1    new CommonBean commonResponse getCommonBean   i  getProjectName    commonResponse getCommonBean   i  getProjectId                 JComboBox combobox  new JComboBox commonBean     public CommonBean String projectName int projectId                   this projectName   projectName          this projectId   projectId           Any help is appreciated

User · Accepted Answer

Method Object JComboBox getSelectedItem   returns a value that is wrapped by Object type so you have to cast it accordingly   Syntax     YourType varName    YourType comboBox getSelectedItem     String value   comboBox getSelectedItem   toString

User · Answer

If the string is empty  comboBox getSelectedItem   toString   will give a NullPointerException  So better to typecast by  String

[java] Get combobox value in Java swing

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