swing java table CustomTableCellRenderer根据单元格内容值更改行颜色
我正在开发java应用程序。我想在一个表中显示数据,该表有3个列名course和year。我根据在互联网上找到的教程使用tablerenderer。这段代码实际上是根据行号用青色和灰色给行着色。。但我只想在year列(year的值)等于某个值(比如3)时,将青色设置为row。这意味着,如果第三行年份列值等于5,则第三行颜色应为青色,否则应为灰色。这是我在网上找到的代码。。那么我该如何为我的目标修改它呢
import java.awt.Color;
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRootPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class CustomCellRenderer{
JTable table;
TableColumn tcol;
public static void main(String[] args) {
new CustomCellRenderer();
}
public CustomCellRenderer(){
JFrame frame = new JFrame("Creating a Custom Cell Reanderer!");
JPanel panel = new JPanel();
String data[][] = {{"Vinod","Computer","3"},
{"Rahul","History","2"},
{"Manoj","Biology","5"},
{"Sanjay","PSD","6"}};
String col [] = {"Name","Course","Year"};
DefaultTableModel model = new DefaultTableModel(data,col);
table = new JTable(model);
tcol = table.getColumnModel().getColumn(0);
tcol.setCellRenderer((TableCellRenderer) new CustomTableCellRenderer());
tcol = table.getColumnModel().getColumn(1);
tcol.setCellRenderer((TableCellRenderer) new CustomTableCellRenderer());
tcol = table.getColumnModel().getColumn(2);
tcol.setCellRenderer((TableCellRenderer) new CustomTableCellRenderer());
JTableHeader header = table.getTableHeader();
header.setBackground(Color.yellow);
JScrollPane pane = new JScrollPane(table);
panel.add(pane);
frame.add(panel);
frame.setSize(500,150);
frame.setUndecorated(true);
frame.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public class CustomTableCellRenderer extends DefaultTableCellRenderer{
public Component getTableCellRendererComponent (JTable table,
Object obj, boolean isSelected, boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent(
table, obj, isSelected, hasFocus, row, column);
if (isSelected) {
cell.setBackground(Color.green);
}
else {
if (row % 2 == 0 ) {
cell.setBackground(Color.cyan);
}
else {
cell.setBackground(Color.lightGray);
}
}
return cell;
}
}
}
# 1 楼答案
不要使用单个渲染器。相反,您可以使用Table Row Rendering中的方法
# 2 楼答案
您可以像在CustomTableCellRenderer类中一样简单地执行此操作