Java 在动态生成的复选框中添加ItemListener
我正在用JavaSwing开发一个餐厅管理系统。我动态显示了数据库中的复选框列表,其中包含mainstock的名称(包含mainstock项的表名)。在循环期间,我在每个复选框上添加了一个ItemListener 当我单击每个复选框时,它会弹出两个JFrame。为什么?如何只弹出一个JFrame并插入所需信息Java 在动态生成的复选框中添加ItemListener,java,swing,checkbox,Java,Swing,Checkbox,我正在用JavaSwing开发一个餐厅管理系统。我动态显示了数据库中的复选框列表,其中包含mainstock的名称(包含mainstock项的表名)。在循环期间,我在每个复选框上添加了一个ItemListener 当我单击每个复选框时,它会弹出两个JFrame。为什么?如何只弹出一个JFrame并插入所需信息 package test; public class test extends javax.swing.JFrame { public static ArrayList<mdeta
package test;
public class test extends javax.swing.JFrame {
public static ArrayList<mdetails> list = new ArrayList<mdetails>();
public test() {
initComponents();
Connection con = (Connection) dbconnection.makeconnection();
String sql="select * from mainstock";
try{
Statement st = con.createStatement();
ResultSet rs = st.executeQuery(sql);
while(rs.next()){
String s2=rs.getString("stock_name");
JCheckBox cb = new JCheckBox("New CheckBox");
cb.setText(s2);
cb.setVisible(true);
cb.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
String name = cb.getActionCommand();
System.out.println(name);
JFrame frame = new JFrame(name);
int stock_id= rmsdao.givestockid(name);
System.out.println(stock_id);
String estimatedplate = JOptionPane.showInputDialog(frame, "Enter the estimated plate of 1 kg"+name);
if(estimatedplate!=null){
list.add(new mdetails(stock_id,estimatedplate));
}
else{
cb.setSelected(false);
}
}
});
jPanel1.add(cb);
jPanel1.validate();
}
con.close();
}
catch(Exception e){
System.out.println("not retrieving"+e);
}
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setResizable(false);
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(65, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 252, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(23, 23, 23))
.addGroup(layout.createSequentialGroup()
.addGap(129, 129, 129)
.addComponent(jButton1)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(37, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, 191, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(50, 50, 50)
.addComponent(jButton1)
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
for (int a = 0; a < list.size(); a++) {
mdetails item = list.get(a);
System.out.println(item.getId());
// rmsdao.insert_menu_details(item.getId(),getitemid,item.getEstimate_plate());
}
}
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new test().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
// End of variables declaration
}
封装测试;
公共类测试扩展了javax.swing.JFrame{
public static ArrayList list=new ArrayList();
公开考试(){
初始化组件();
Connection con=(Connection)dbconnection.makeconnection();
String sql=“从主锁中选择*”;
试一试{
语句st=con.createStatement();
结果集rs=st.executeQuery(sql);
while(rs.next()){
字符串s2=rs.getString(“股票名称”);
JCheckBox cb=新的JCheckBox(“新复选框”);
cb.setText(s2);
cb.setVisible(真);
cb.addItemListener(新的ItemListener(){
@凌驾
公共无效itemStateChanged(ItemEvent e){
字符串名称=cb.getActionCommand();
System.out.println(名称);
JFrame=新JFrame(名称);
int stock_id=rmsdao.givestockid(名称);
系统输出打印项次(库存标识);
String estimatedplate=JOptionPane.showInputDialog(框,“输入1公斤的估计板”+名称);
如果(估计数据!=null){
列表.添加(新的详细信息(库存id,估计数据));
}
否则{
cb.选择(假);
}
}
});
jPanel1.add(cb);
jPanel1.validate();
}
con.close();
}
捕获(例外e){
System.out.println(“未检索”+e);
}
}
@抑制警告(“未选中”)
//
私有组件(){
jPanel1=newjavax.swing.JPanel();
jButton1=newjavax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
可设置大小(假);
setText(“jButton1”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(65,简称最大值)
.addComponent(jPanel1,javax.swing.GroupLayout.PREFERRED\u SIZE,252,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(23,23,23))
.addGroup(layout.createSequentialGroup()
.addGap(129、129、129)
.addComponent(jButton1)
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u VALUE))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(37,简称最大值)
.addComponent(jPanel1,javax.swing.GroupLayout.PREFERRED\u SIZE,191,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(50,50,50)
.addComponent(jButton1)
.addContainerGap())
);
包装();
}//
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
对于(int a=0;a