JTable监听器ListSelectionListener 每次选中调用两次

前言

构建如下监听器

class DemoListListener implements ListSelectionListener {

      public void valueChanged (ListSelectionEvent e) {
      		System.out.println("DemoListListener ");
           // do something
      }
}

在JTable选中行的时候会调用两次，即运行结果为：

DemoListListener
DemoListListener

---

Solution

1. 检查当前行是否正在被修改

调用e.getValueIsAdjusting();

class DemoListListener implements ListSelectionListener {

      public void valueChanged (ListSelectionEvent e) {
      		if(e.getValuesAddjusting())return;//检查是否正在被修改！
      		System.out.println("DemoListListener ");
           // do something
      }
}

Reference:

ListSelectionListener invoked twice

e.getValueIsAdjusting is what you are looking for. As stated in the javadoc of that method

2. 添加MouseListener，实现MouseAdapter

   jTable.addMouseListener(new MouseAdapter() {
       @Override
       public void mouseClicked(MouseEvent e) {
           //do something
       }
   });