使用Dialog的易错点

使用Dialog的易错点

container和panel在actionListener的添加顺序上有区别

• panel的添加位置没什么限制

• 而container在添加监听事件时必须添加在container.add()之前，否则会无效

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;public class checkPage extends JDialog implements ActionListener {public static JTable table=new JTable();public checkPage(JFrame frame){super(frame,"购买查询页面",true);setBounds(50,50,500, 550);setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);setLayout(new FlowLayout());Container container=getContentPane();  //创建一个容器fillTable(table);JScrollPane scroll=new JScrollPane(table);container.add(scroll);JButton jb=new JButton("仔细查询");jb.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {new carefulCheckPage(frame);}});container.add(jb);container.validate();setVisible(true);validate();}public static void fillTable(JTable table){DefaultTableModel tableModel=(DefaultTableModel) Model();    //获得表格模型tableModel.setRowCount(0);    //清空表格中的数据tableModel.setColumnIdentifiers(new Object[]{"ID","商品名称","商品单价","商品数量"});    //设置表头tableModel.addRow(new Object[]{"001","pencil","13.3","10"});    //增加列table.setRowHeight(30);table.setModel(tableModel);}@Overridepublic void actionPerformed(ActionEvent e) {}
}