最新一键自助建站程序源码,阿里云 wordpress博客,四川省建设工程造价信息网站,做网站的公司为什么人少了我想创建类似下图的内容,当用户从组合框选项中选择年份、月份和日期时,这些操作将更改标题,并且必须根据所选数据进行更改,这很简单,我还是新手到目前为止,我已经做到了,问题是它不起作用,我怎么能做到呢?,你能帮我一下吗?import java.awt.GridLayout;import java.awt.event.…我想创建类似下图的内容,当用户从组合框选项中选择年份、月份和日期时,这些操作将更改标题,并且必须根据所选数据进行更改,这很简单,我还是新手到目前为止,我已经做到了,问题是它不起作用,我怎么能做到呢?,你能帮我一下吗?import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JTextField;public class DateForm_Complete extends JFrame {private JLabel year, month, day;private JComboBox cmonth, cday, cyear;public DateForm_Complete() {setTitle(Date Selection);setSize(400,100);setupWidgets();setVisible(true);}private void setupWidgets() {year new JLabel(Year);month new JLabel(Month);day new JLabel(Day);cyear new JComboBox();cmonth new JComboBox();cday new JComboBox();setLayout(new GridLayout (2,3));add(year); add(month); add(day);add(cyear); add(cmonth); add(cday);for (int i1900; i2019; i){cyear.addItem(i);}String months[] {January,February,March,April,May,June,July,August,September,October,November,December};for (int i0; i12; i){cmonth.addItem(months[i]);}for (int i1; i32; i){cday.addItem(i);}setupEvents();}private void setupEvents() {setDefaultCloseOperation(EXIT_ON_CLOSE);cyear.addActionListener(new ActionListener() {Overridepublic void actionPerformed(ActionEvent ev) {JComboBox combo (JComboBox)ev.getSource();String texty (String)combo.getSelectedItem();}});cmonth.addActionListener(new ActionListener() {Overridepublic void actionPerformed(ActionEvent ev) {JComboBox combo (JComboBox)ev.getSource();String textm (String)combo.getSelectedItem();}});cday.addActionListener(new ActionListener() {Overridepublic void actionPerformed(ActionEvent ev) {JComboBox combo (JComboBox)ev.getSource();String textd (String)combo.getSelectedItem();}});setTitle(Today is texd of textm of texty);}public static void main(String[] args) {new DateForm_Complete();}}
