我想在点击按钮后更改JTable
行的颜色。我发现了许多示例,展示了如何使用不同颜色的行启动表,以及如何在选择行时更改颜色。但是,我想知道点击JButton时改变颜色的正确方法是什么。
TableCellRenderer colorRenderer = new ColorRenderer();
table.setDefaultRenderer(String.class, colorRenderer);
private class ColorRenderer extends DefaultTableCellRenderer {
private static final long serialVersionUID = 1L;
@Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
if (hasFocus) {
setBackground(Color.cyan);
} else if (isSelected) {
setBackground(table.getSelectionBackground());
} else {
setBackground(table.getBackground());
}
return this;
}
}
答案 0 :(得分:1)
考虑到您要将数据加载到JTable
中:
public void fillTable(){
List<String> columns = new ArrayList<String>();
List<String[]> values = new ArrayList<String[]>();
columns.add("col1");
columns.add("col2");
columns.add("col3");
for (int i = 0; i < 100; i++) {
values.add(new String[] {"val"+i+" col1","val"+i+" col2","val"+i+" col3"});
}
TableModel tableModel = new DefaultTableModel(values.toArray(new Object[][] {}), columns.toArray());
tableName.setModel(tableModel);
}
然后,您可以像使用此类一样将渲染设置为JTable
:
public class EvenOddRenderer implements TableCellRenderer {
public static final DefaultTableCellRenderer DEFAULT_RENDERER = new DefaultTableCellRenderer();
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
DEFAULT_RENDERER.setHorizontalAlignment(JLabel.CENTER);
Component renderer = DEFAULT_RENDERER.getTableCellRendererComponent(
table, value, isSelected, hasFocus, row, column);
((JLabel) renderer).setOpaque(true);
Color foreground, background;
Color alternate = new Color(0xC0, 0xC0, 0xF0);
Color lightBlue = new Color(204, 204, 255);
if (isSelected) {
foreground = Color.black;
background = Color.gray;
} else {
if (row % 2 == 0) {
foreground = Color.black;
background = Color.white;
} else {
foreground = Color.black;
background = lightBlue;
}
}
renderer.setForeground(foreground);
renderer.setBackground(background);
return renderer;
}
}
像这样:
TableCellRenderer renderer = new EvenOddRenderer();
tableName.setDefaultRenderer(Object.class, renderer);
tableName.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
然后您可以使用setRowSelectionInterval()
方法选择任何行:
private void btn(java.awt.event.ActionEvent evt) {
int index = 0;
tableName.setRowSelectionInterval(index, index);
}
您在此处选择JTable
在此示例中,您选择Color.gray
作为JTable
选择颜色
你可以肯定地改变它
答案 1 :(得分:0)
此方法也适用于每列中包含不同数据类型的表,因此您不必为每种类型的数据创建自定义渲染器。