valueevent.html
来自「java类库详细讲解」· HTML 代码 · 共 209 行
HTML
209 行
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Listening for Changes to the Rows and Columns of a JTable Component
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!-- BODY CODE {font-family: Courier, Monospace; font-size: 11pt} TABLE, BODY {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10pt} PRE {font-family: Courier, Monospace; font-size: 10pt} H3 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11pt} A.eglink {text-decoration: none} A:hover.eglink {text-decoration: underline} -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
</TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
>
<A HREF="../index.html">List of Packages</A>
>
<B><A HREF="../javax.swing.table/pkg.html">javax.swing.table</A></B><font color="#666666" SIZE="-2">
[62 examples]
</font>
>
<B><A HREF="../javax.swing.table/pkg.html#Events">Events</A></B><font color="#666666" SIZE="-2">
[4 examples]
</font>
</DIV><P>
<h3>
e964.
Listening for Changes to the Rows and Columns of a JTable Component</h3>
This example demonstrates how to detect row and columns being added,
deleted, or changed in a table component. To listen for these events,
a listener must be added to the <code>JTable</code>'s table model.
Note: When a column is added, the type of the event is <code>UPDATE</code>.
<pre>
<font color="#0066ff"><i>table</i></font>.getModel().addTableModelListener(new MyTableModelListener(table));
public class MyTableModelListener implements TableModelListener {
JTable table;
// It is necessary to keep the table since it is not possible
// to determine the table from the event's source
MyTableModelListener(JTable table) {
this.table = table;
}
public void tableChanged(TableModelEvent e) {
int firstRow = e.getFirstRow();
int lastRow = e.getLastRow();
int mColIndex = e.getColumn();
switch (e.getType()) {
case TableModelEvent.INSERT:
// The inserted rows are in the range [firstRow, lastRow]
for (int r=firstRow; r<=lastRow; r++) {
// Row r was inserted
}
break;
case TableModelEvent.UPDATE:
if (firstRow == TableModelEvent.HEADER_ROW) {
if (mColIndex == TableModelEvent.ALL_COLUMNS) {
// A column was added
} else {
// Column mColIndex in header changed
}
} else {
// The rows in the range [firstRow, lastRow] changed
for (int r=firstRow; r<=lastRow; r++) {
// Row r was changed
if (mColIndex == TableModelEvent.ALL_COLUMNS) {
// All columns in the range of rows have changed
} else {
// Column mColIndex changed
}
}
}
break;
case TableModelEvent.DELETE:
// The rows in the range [firstRow, lastRow] changed
for (int r=firstRow; r<=lastRow; r++) {
// Row r was deleted
}
break;
}
}
}
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
Related Examples
</font></td>
</tr>
</table>
e963. <a class="eglink" href="SelEvent.html?l=rel">
Listening for Selection Events in a JTable Component
</a>
<br>
e965. <a class="eglink" href="ColEvent.html?l=rel">
Listening for Column-Related Changes in a JTable Component
</a>
<br>
e966. <a class="eglink" href="ColHeadEvent.html?l=rel">
Listening for Clicks on a Column Header in a JTable Component
</a>
<br>
<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
See also:
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Cells">
Cells
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Column%20Heads">
Column Heads
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Columns">
Columns
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Editing">
Editing
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Layout">
Layout
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Rows">
Rows
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Scrolling">
Scrolling
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Selection">
Selection
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Sorting">
Sorting
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Table%20Model">
Table Model
</a>
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Tool%20Tips">
Tool Tips
</a>
</td>
</tr>
</table>
<br>
<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
© 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>
⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?