java – jtable cellrenderer在运行时更改单元格的backgroundcol

我正在尝试创建一个表格和颜色特定的单元格,黄色,红色或白色,具体取决于其他列的内容.为此,我循环填充值的行,然后检查内容.对于当前显示在屏幕上的每一行都可以正常工作,但是当程序到达未显示的行时,或者如果用户尝试滚动每个单元格,则将其背景颜色更改为白色.我在网上搜索了解决方案,唯一合理的想法是在每次循环后重置cellRenderer,这不起作用,因为它也会重置每个单元格.

我希望有人知道这方面的解决方案,或者可以让我知道我在哪里搞砸了什么.

我正在使用这个循环

for(int e = 0; e < modules.size(); e++)
    {
    gui.clearOutputStream();
    gui.getOutputStream().setText("Load Modul " + modules.get(e) + "rn");
    version = getVersion(modules.get(e));

    //Update current Row
    updateRow(gui.getReleaseTabelle(),e);
    }

它调用这种方法

public void updateRow(JTable target,int row){
//...
//insert Values here
//...
CustomRenderer cr = new CustomRenderer();
        cr.tab = target;
        if(!target.getValueAt(row,2).equals(target.getValueAt(row,3)))
        {
            cr.Val1 = target.getValueAt(row,1).toString();
            target.setValueAt("X",row,1);
        }
        else if(!target.getValueAt(row,7).equals(""))
        {
            cr.Val1 = target.getValueAt(row,1).toString();
            target.setValueAt("Y",1);
        }
        else
        {

        }
        target.getColumnModel().getColumn(1).setCellRenderer(cr);

}

这是我的CustomRenderer

class CustomRenderer extends DefaultTableCellRenderer 
    {
private static final long serialVersionUID = 6703872492730589499L;
        public String Val1; 
        public JTable tab;

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

            if(tab.getValueAt(row,1).equals("Y")){
                cell.setBackground(new java.awt.Color(255,255,0));
                tab.setValueAt(Val1,1);
            }
            else if(tab.getValueAt(row,1).equals("X")){
                cell.setBackground(new java.awt.Color(255,50,50));
                tab.setValueAt(Val1,1);
            }
            else
            {
                //do nothing
            }
            return cell;
        }
    }

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 ColoringCells {

    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,int column)
    {
        Component cellComponent = super.getTableCellRendererComponent(table,column);

        if(table.getValueAt(row,column).equals("Y")){
            cellComponent.setBackground(Color.YELLOW);
        } else if(table.getValueAt(row,column).equals("N")){
            cellComponent.setBackground(Color.GRAY);
        }
        return cellComponent;
    }
}