Swing - 是否可以在JTable单元格中设置“特定”文本的字体颜色？
[英]Swing - Is it possible to set the font color of 'specific' text within a JTable cell?
问题描述
I have a JTable where one column displays values in the following format: 
我有一个JTable，其中一列显示以下格式的值：
423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]
I am wondering if it is possible to display the values within square brackets in RED? 我想知道是否可以在RED中的方括号内显示值？
I have been googling around for the last few days and have found several examples showing how to set the 'background' of a cell but not really how to change the font of a cell especially not a specific part of the text. 我最近几天一直在谷歌搜索，并找到了几个例子，展示了如何设置单元格的“背景”，但实际上并不是如何更改单元格的字体，尤其是文本的特定部分。
public class myTableCellRenderer
extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {
Component c =
super.getTableCellRendererComponent(table, value,
isSelected, hasFocus,
row, column);
if (column == 3) {
c.setForeground(Color.YELLOW);
c.setBackground(Color.RED);
}
return c;
}
Is it really possible to change part of the text to be a different color (ie the text that is within the square brackets). 是否真的可以将文本的一部分更改为不同的颜色（即方括号内的文本）。
Edit 编辑
The text i showed as an example is the actual text shown in the table cell (the comma separators are not representing columns). 我作为示例显示的文本是表格单元格中显示的实际文本（逗号分隔符不表示列）。 The text displayed in the cell is a comma separated string that i display on the table in column 3. 单元格中显示的文本是逗号分隔的字符串，我在第3列的表格中显示。
As an example the table could look like this 作为一个例子，表格看起来像这样
product_id |product_name| invoice_numbers
12 | Books | 423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]
323 | Videos | 423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]
4434 | Music | 423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]
4 个解决方案
解决方案1
5 2013-01-27 12:04:44
You must use a Cell renderer combined with HTML. 您必须使用与HTML结合的Cell渲染器。
Here is a small demo example: 这是一个小的演示示例：
import java.awt.BorderLayout;
import java.awt.Component;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
public class TestTable2 {
class MyCellRenderer extends DefaultTableCellRenderer {
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component tableCellRendererComponent = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (value instanceof String) {
String string = (String) value;
if (string.indexOf('[') > -1) {
setText(getHTML(string));
}
}
return tableCellRendererComponent;
}
private String getHTML(String string) {
StringBuilder sb = new StringBuilder();
sb.append("<html>");
int index = 0;
while (index < string.length()) {
int next = string.indexOf('[', index);
if (next > -1) {
int end = string.indexOf(']', next);
if (end > -1) {
next++;
sb.append(string.substring(index, next));
sb.append("<span style=\"color: red;\">");
sb.append(string.substring(next, end));
sb.append("</span>");
index = end;
} else {
break;
}
} else {
break;
}
}
sb.append(string.substring(index, string.length()));
sb.append("</html>");
return sb.toString();
}
}
protected void initUI() {
DefaultTableModel model = new DefaultTableModel();
for (int i = 0; i < 2; i++) {
model.addColumn("Col-" + (i + 1));
}
for (int i = 0; i < 200; i++) {
Vector<Object> row = new Vector<Object>();
for (int j = 0; j < 5; j++) {
row.add("423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]");
}
model.addRow(row);
}
JTable table = new JTable(model);
table.setDefaultRenderer(Object.class, new MyCellRenderer());
JFrame frame = new JFrame(TestTable2.class.getSimpleName());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JScrollPane scrollpane = new JScrollPane(table);
frame.add(scrollpane, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
UnsupportedLookAndFeelException {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new TestTable2().initUI();
}
});
}
}
And the result: 结果如下：
解决方案2
2 2013-01-27 12:00:33
Is it really possible to change part of the text to be a different color
yes is possible, for 是的可能，因为
simple highlighter is possible with
JTextField/JTextAreaasRenderers component使用JTextField/JTextArea作为Renderers component可以使用简单的荧光笔multiple of the
Highlighterhave to look forJTextPaneasRenderers componentHighlighter多个必须查找JTextPane作为Renderers component(easier of ways) you can to formatting cell by using
Html(todaysJava up to Html3.2)（更简单的方法）你可以使用Html格式化单元格（今天的Java up to Html3.2）
解决方案3
1 2013-01-27 11:57:19
This is what you are looking for Cell render 这就是您正在寻找Cell渲染
How to proceed: 如何进行：
get the default cell render component using
getTableCellRendererComponent()function with the appropriate parameters.使用带有适当参数的getTableCellRendererComponent()函数获取默认的单元格渲染组件。parse the text of the cell and apply your formatting using
setForeground()function.解析单元格的文本并使用setForeground()函数应用您的格式。
解决方案4
0 2013-01-27 11:57:36
Yes It is possible. 对的，这是可能的。
EDIT 编辑
First you need to create a subclass of DefaultTableCellRenderer where you override getTableCellRendererComponent method to render the desired column according to your need. 首先，您需要创建DefaultTableCellRenderer的子类，您可以在其中覆盖getTableCellRendererComponent方法，以根据需要呈现所需的列。 And then change the renderer for that column by the subclass of DefaultTableCellRenderer . 然后通过DefaultTableCellRenderer的子类更改该列的渲染器。
Here is the example to achieve this task: 以下是实现此任务的示例：
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;
public class TableExample extends JFrame
{
JTable myTable ;
Object[][] data= {
{"34","[56],987,[(56)]"},
{"5098","345,([{78}])"},
{"567","4312"}
};
Object[] col = {"First","Second"};
public TableExample()
{
super("CellRendererExample");
}
public void prepareAndShowGUI()
{
myTable = new JTable(data,col);
myTable.getColumnModel().getColumn(1).setCellRenderer(new MyTableCellRenderer());
JScrollPane jsp = new JScrollPane(myTable);
getContentPane().add(jsp);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setVisible(true);
}
public class MyTableCellRenderer extends DefaultTableCellRenderer
{
public Component getTableCellRendererComponent(JTable table,Object oValue, boolean isSelected, boolean hasFocus, int row, int column)
{
Component c = super.getTableCellRendererComponent(table, oValue,isSelected, hasFocus,row, column);
String value = (String)oValue;
StringBuilder sBuilder = new StringBuilder();
sBuilder.append("<HTML><BODY>");
StringTokenizer tokenizer = new StringTokenizer(value,",");
while (tokenizer.hasMoreTokens())
{
String token = tokenizer.nextToken();
int index = token.indexOf("[");
if (index != -1)
{
sBuilder.append(token.substring(0,index));
int lastIndex = token.lastIndexOf(']');
String subValue = token.substring(index + 1,lastIndex);
sBuilder.append("[<FONT color = red>"+subValue+"</FONT>]");
if (lastIndex < token.length() -1)
{
sBuilder.append(token.substring(lastIndex+1,token.length()));
}
sBuilder.append(",");
}
else
{
sBuilder.append(token+",");
}
}
if (sBuilder.lastIndexOf(",") == sBuilder.length() - 1)
{
sBuilder.deleteCharAt(sBuilder.length() - 1 );
}
sBuilder.append("</BODY></HTML>");
value = sBuilder.toString(); ;
JLabel label =(JLabel)c;
label.setText(value);
return label;
}
}
public static void main(String st[])
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
TableExample tae = new TableExample();
tae.prepareAndShowGUI();
}
});
}
}
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