如何检查是否从Java的组合框中选择了特定项目（确定所选元素的数量）

Question

I added a combo box to my JFrame and those items are added from an array. What i want to know is that how to check whether and items is selected so that i can do some function with that like;

String[] osCM = {"--Select--", "Windows", "Mac", "Unix", "Linux" };     
JComboBox cmbOS = new JComboBox(osCM);
cmbOS.setBounds(116, 69, 149, 20);
add(cmbOS); 

if(//code to check a particular item is selected){
    //do some function
}else if(//code to check a particular item is selected){
    //do some function
}else{
    //do some function
}

Please help. Thanks is advance.

Answer 1

if（cmbOS.getSelectedIndex（）== 0）