我有一个 JTable，其中一列以下列格式显示值:
423545(50),[7568787(50)],53654656,2021947(50),[021947],2021947(50),[8021947(50)]
我想知道是否可以用红色显示方括号内的值？
过去几天我一直在谷歌上搜索，发现了几个示例，展示了如何设置单元格的“背景”，但没有真正说明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;
}
是否真的可以将部分文本更改为不同的颜色(即方括号内的文本)。
编辑
我作为示例显示的文本是表格单元格中显示的实际文本(逗号分隔符不代表列)。单元格中显示的文本是逗号分隔的字符串，我显示在表格的第 3 列中。
举个例子，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)]
最佳答案
您必须结合使用 Cell 渲染器和 HTML。
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();
}
});
}
}
结果:
关于java - Swing - 是否可以在 JTable 单元格中设置 'specific' 文本的字体颜色？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/14546968/