JTable的单元格渲染器 - 彩色行 [英] Cell Renderer for JTable - coloured rows

问题描述

我一直在四处寻找解决方案，我不能在不问自己问题的情况下从不同地方做头或尾，如何让我的桌子做彩色行。

I've been looking around for a solution to this and I can't make head nor tail from various places of how to get my table to do coloured rows without asking my own question.

从我看过的每个地方我都会收集细胞渲染器，但问题是我不知道如何将它应用到我自己的情况。

From every place I've looked I gather I need to use a cell renderer but the problem is I don't know how to apply it to my own situation.

所以我有一个简单的JTable 3列，我只想让每一行以绿色，黄色或红色突出显示，具体取决于单独变量的值（表中未显示）。

So I have a simple JTable with 3 columns and I simply want each row to be highlighted in either green, yellow or red depending on the value of a separate variable (not displayed in the table).

看起来它应该非常简单，但我不知道怎么做。如果它有助于我的表定义如下：

It seems like it should be really simple but I can't get how to do it. If it helps my table is defined like:

studentTableModel = new DefaultTableModel(new Object[]{"Name", "StudentNo", "Part"}, 0);
jt_studentTable = new JTable(studentTableModel);
jt_studentTable.getColumnModel().getColumn(2).setPreferredWidth(10);
studentTableModel.addRow(new Object[]{"(empty)", "(empty)", "(empty)"});
JScrollPane jsp_tableScroller = new JScrollPane(jt_studentTable);
jsp_tableScroller.setPreferredSize(new Dimension(200,190));
middleCentrePanel.add(jsp_tableScroller);

表格中的行会根据组合框的选择而变化。

The rows in the table change depending of the selection of a combo box.

提前致谢。

推荐答案

import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;


public class RowRendering {

    private static Object[] columnName = {"Yes", "No"};
    private static Object[][] data = {
            {"Y", "N"},
            {"N", "Y"},
            {"Y", "N"}
    };


    public static void main(String[] args) {
        Runnable r = new Runnable() {

            @Override
            public void run() {

                JFrame frame = new JFrame();
                JTable table = new JTable(data, columnName);
                table.getColumnModel().getColumn(0).setCellRenderer(new CustomRenderer());
                table.getColumnModel().getColumn(1).setCellRenderer(new CustomRenderer());

                frame.add(new JScrollPane(table));
                frame.setTitle("Rendering in JTable");
                frame.pack();
                frame.setVisible(true);
            }
        };

        EventQueue.invokeLater(r);
    }
}


class CustomRenderer extends DefaultTableCellRenderer 
{
private static final long serialVersionUID = 6703872492730589499L;

    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
    {
        Component cellComponent = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);

        if(row == 0){
            cellComponent.setBackground(Color.YELLOW);
        } else if ( row == 1){
            cellComponent.setBackground(Color.GRAY);
        } else {
            cellComponent.setBackground(Color.CYAN);
        }
        return cellComponent;
    }
}

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