java - 列标题在我点击它之前不会改变

Question

我有一个 jtable ,,,它的标题有一个弹出菜单，您可以从中更改标题，但直到我单击标题时更改才可见...请帮助

import java.awt.Color;
import java.awt.Component;
import java.awt.Font;

import javax.swing.BorderFactory;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;

public class MyCustomHeaderRender extends DefaultTableCellRenderer {
String colmNameToChange;
int colomHeaderClicked;

public MyCustomHeaderRender(String nameRecieved, int coloum) {

    colmNameToChange = nameRecieved;  
    colomHeaderClicked = coloum;     
}

@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus,
        int row, int column) {

    Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
    if (colomHeaderClicked == column) {
        setOpaque(true);
        table.getColumnModel().getColumn(colomHeaderClicked).setHeaderValue(colmNameToChange);
        table.getTableHeader().repaint();
        table.repaint();

    }

    return c;
}

}

`

Answer 1

渲染器与更改列文本无关。它仅绘制该列的文本。所以摆脱渲染器。

相反，您需要实际更新 TableColumn 以包含新的列名称。

所以代码会是这样的:

TableColumnModel tcm = table.getColumnModel();
TableColumn tc = tcm.getColumn(...);
tc.setHeaderValue(...);
table.getTableHeader().repaint();