Question

java中通过什么函数去下拉列表框的value

Answer 1

JComboBox：将按钮或可编辑字段与下拉列表组合的组件。用户可以从下拉列表中选择值，下拉列表在用户请求时显示。如果使组合框处于可编辑状态，则组合框将包括用户可在其中键入值的可编辑字段。
getSelectedItem() ：获得返回当前所选项。

Answer 2

如果是JComboBox，则用getSelectedItem方法。例如：你声明一个JComboBox 变量 comboBox则可以用“comboBox.getSelectedItem()”得到所取的值，是String类型的。

Answer 3

这个对象？
java.lang.Object
extended by java.awt.Component
extended by java.awt.Container
extended by javax.swing.JComponent
extended by javax.swing.JComboBox

Object getItemAt(int index)
Returns the list item at the specified index.
int getItemCount()
Returns the number of items in the list.

int getSelectedIndex()
Returns the first item in the list that matches the given item.

Object getSelectedItem()
Returns the current selected item.
Object[] getSelectedObjects()
Returns an array containing the selected item.

void setSelectedIndex(int anIndex)
Selects the item at index anIndex.
void setSelectedItem(Object anObject)
Sets the selected item in the combo box display area to the object in the argument.