博为峰Java技术文章 ——JavaSE Swing使用ComboBoxModel创建下拉列表框Ⅱ

博为峰小博老师：

下面利用ComboBoxModel来创建一个下拉列表框实例，其代码如下所示:

publicclassBWF {

String[]s={"桃花","梅花","玫瑰","月季","茉莉","菊花"};

publicBWF(){

JFramejf=newJFrame("博为峰教育");

ContainercontentPane=jf.getContentPane();

ComboBoxModelmodel=newUserDefineComboBoxModel();

JComboBoxcombo=newJComboBox(model);

combo.setBorder(BorderFactory.createTitledBorder("你最喜欢的花是那个？"));

contentPane.add(combo);

jf.pack();

jf.setVisible(true);

jf.addWindowListener(newWindowAdapter() {

publicvoidwindowClosing(WindowEvente) {

System.exit(0);

}

});

}

publicstaticvoidmain(String[]args) {

newBWF();

}

classUserDefineComboBoxModelextendsAbstractListModelimplementsComboBoxModel{

Stringitem=null;

publicintgetSize() {

//TODOAuto-generated method stub

returns.length;

}

publicString getElementAt(intindex) {

//TODOAuto-generated method stub

returns[index++];

}

publicvoidsetSelectedItem(ObjectanItem) {

item=(String)anItem;

}

publicObject getSelectedItem() {

returnitem;

}

}

}