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[英]Infinispan @CacheEntryExpired listener - event firing twice
[英]ListSelection Listener not firing event
有谁知道为什么
System.out.println(e.getFirstIndex()); System.out.println(e.getLastIndex()); 两者都不做什么? 我的监听器未正确注册吗? 我想知道何时选择某个单元格并对其进行操作。 就像通过鼠标或键选择该单元格时为该单元格设置默认文本一样。
package VLGui;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.DateFormat;
import java.util.*;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.Timer;
import javax.swing.table.*;
import VLCore.cellSelectedListener;
public class mainFrame extends JFrame{
private JLabel lblTime;
private Vector columnName = new Vector();
private Vector tblData = new Vector();
private JTable JTbl;
private Timer timer = new Timer(1000,new MyListener());
private JPanel topPnl,cenPnl,btmPnl;
private Calendar time;
private Object[] columnNames = {"Veh No.","Description","Time In","Time Out"};
public mainFrame()
{
timer.start();
//jtable settings
JTbl = new JTable(new DefaultTableModel(columnNames,1));
JTbl.setPreferredScrollableViewportSize(JTbl.getPreferredSize());
JTbl.setFillsViewportHeight(true);
JTbl.setCellSelectionEnabled(false);
JTbl.setColumnSelectionInterval(0,0);
JTbl.setRowSelectionInterval(0,0);
JTbl.getSelectionModel().addListSelectionListener(new cellSelectedListener(JTbl));
//Settings
setDefaultCloseOperation(EXIT_ON_CLOSE);
setTitle("Vehicle Log");
setSize(500,1000);
setVisible(true);
//Dec
JScrollPane tableContainer = new JScrollPane(JTbl);
topPnl = new JPanel();
cenPnl = new JPanel();
btmPnl = new JPanel();
lblTime = new JLabel();
//Adding Components
topPnl.add(lblTime,BorderLayout.CENTER);
cenPnl.add(tableContainer);
getContentPane().add(topPnl,BorderLayout.NORTH);
getContentPane().add(cenPnl,BorderLayout.CENTER);
//add(btmPnl);
}
public class MyListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
time = Calendar.getInstance();
lblTime.setText(time.getTime().toString());
lblTime.repaint();
}
}
}
package VLCore;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class cellSelectedListener implements ListSelectionListener {
private JTable jTbl;
public cellSelectedListener()
{
}
public cellSelectedListener(JTable tbl)
{
jTbl = tbl;
}
@Override
public void valueChanged(ListSelectionEvent e) {
ListSelectionModel lsm = (ListSelectionModel)e.getSource();
System.out.println(e.getFirstIndex());
System.out.println(e.getLastIndex());
}
}
问题是,该行已被选中。
表选择模型与行的选择更改有关。
如果您更改注册侦听器的顺序,如下所示...
JTbl.getSelectionModel().addListSelectionListener(new cellSelectedListener(JTbl));
JTbl.setColumnSelectionInterval(0, 0);
JTbl.setRowSelectionInterval(0, 0);
您将看到行选择更改。
更新代码审查...
通常,此JTbl.setPreferredScrollableViewportSize(JTbl.getPreferredSize());
这不是一个好主意。 您确实希望将其留给滚动窗格来做出此类决定。 如果您确实想影响表格的宽度,则可以更改列的大小。
Java命名约定建议所有实例变量JTbl
小写字母开头,因此JTbl
将变为jTbl
而所有类jTbl
大写字母开头,因此mainFrame
将变为MainFrame
...这是小事情,但这是人们真正jTbl
。
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