java - 获取前台单元格jtable

Question

我有Jtable，有这样的记录 http://i.stack.imgur.com/TFqNB.jpg

我使用JTable.prepareRenderer(...)方法。

但是后来我得到 getForeground 它的颜色是错误的，这是我的代码，所以出了什么问题？？

JTable代码:

tb1_1 = new javax.swing.JTable(){
    public Component prepareRenderer (TableCellRenderer renderer, int rowIndex, int columnIndex){
        Component componenet = super.prepareRenderer(renderer, rowIndex, columnIndex);
        if(rowIndex %2 == 0){
            componenet.setForeground(Color.RED);
        }else{
            componenet.setForeground(Color.BLACK);
        }
        return componenet;
    }
};

类获取颜色:

public class GetColor {

    private int red;
    private int green;
    private int blue;
    private Color color;

    public GetColor(Color color) {
        this.color = color;
    }

    public boolean isColorRed() {
        return getRed() == 255 && getGreen() == 0 && getBlue() == 0;
    }

    private int getRed() {
        return color.getRed();
    }

    private int getGreen() {
        return color.getGreen();
    }

    private int getBlue() {
        return color.getBlue();
    }

}

最终我的代码返回isRed

int r = 2;
int cl = 3;
TableCellRenderer tcr = tb1_1.getCellRenderer(r, cl);
Component c = tcr.getTableCellRendererComponent(tb1_1, dtb.getValueAt(r, cl), false, false, r, cl);
GetColor gc = new GetColor(c.getForeground());
System.err.println(gc.isColorRed()); **// is will return false when get Cell have foreground color red**

Answer 1

您正在查看 default renderer 提供的前景色,

Component c = tcr.getTableCellRendererComponent(table, model.getValueAt(r, cl), false, false, r, cl);
System.out.println(c.getForeground());

通常是黑色。

java.awt.Color[r=0,g=0,b=0]

您可能想查看 prepareRenderer() 提供的颜色，

Component c = table.prepareRenderer(tcr, r, cl);
System.out.println(c.getForeground());

您将其设置为红色。

java.awt.Color[r=255,g=0,b=0]