在一个jcombobox中进行选择启用另一个jcombobox [英] Make a selection in one jcombobox enable a different jcombobox

问题描述

我有7个jcombobox，它们都以相同的默认选择开头.如果在前面的jcombobox中选择了默认设置以外的其他选项，那么如何使下一个启用?

I have 7 jcomboboxes that all start with the same default selection. How do I make then next one enabled when something other than the default if selected in the preceding jcombobox?

        if ( ! (custData1.equals("Please Select a Customer from the dropdown menu")) ){
        custData2.setEnabled(true);
        if ( ! (custData2.equals("Please Select a Customer from the dropdown menu")) ){
            custData3.setEnabled(true);
            if ( ! (custData3.equals("Please Select a Customer from the dropdown menu")) ){
            custData4.setEnabled(true);
            if ( ! (custData4.equals("Please Select a Customer from the dropdown menu")) ){
            custData5.setEnabled(true);
            if ( ! (custData5.equals("Please Select a Customer from the dropdown menu")) ){
            custData6.setEnabled(true);
            if ( ! (custData6.equals("Please Select a Customer from the dropdown menu")) ){
            custData7.setEnabled(true);
            }
           }
          }
         }
        }
    }

这似乎不起作用...

This doesn't seem to work...

推荐答案

通过扩展JComboBox创建自定义JComboBox.使该类接受对前面组合框的引用.有它本身和作为前述框和每当项被选择应该启用/禁用本身.

Create a custom JComboBox by extends JComboBox. Make that class take in a reference to the preceding combobox. Have it and itself as an ActionListener to the preceding box and whenever an item is selected it should enable/disable itself.

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