在JTable列中设置右对齐

Question

I am creating an application for a billing facility. I want the amount column to display with right alignment. How do I set the right alignment for a JTable column?

Answer 1

DefaultTableCellRenderer rightRenderer = new DefaultTableCellRenderer();
rightRenderer.setHorizontalAlignment(JLabel.RIGHT);
table.getColumnModel().getColumn(4).setCellRenderer(rightRenderer);

Answer 2

Try this:

JTable tbl = new JTable(3,3) {
    DefaultTableCellRenderer renderRight = new DefaultTableCellRenderer();

    { // initializer block
        renderRight.setHorizontalAlignment(SwingConstants.RIGHT);
    }

    @Override
    public TableCellRenderer getCellRenderer (int arg0, int arg1) {
        return renderRight;
    }
};

Answer 3

See Concepts: Editors and Renderers , noting " Number — rendered by a right-aligned label." Just have your TableModel return the correct class. As a concrete example, note that Integer is a Number , while examining the implementation of getColumnClass() in this example . In this related example , the zeroth colIndex returns Object.class , which is "rendered by a label that displays the object's string value." By default, the label is left-aligned.

switch (colIndex) {
    case 0: return Object.class;
    …
}

In contrast, Integer.class is "rendered by a right-aligned label."

switch (colIndex) {
    case 0: return Integer.class;
    …
}

These are examples of using Class Literals as Runtime-Type Tokens , discussed here in the context of JTable .

Answer 4

You will have to get DefaultTableCellRenderer for table cells and call setHorizontalAlignment(alignment).

Example can be found on links:

http://www.techrepublic.com/article/how-to-justify-data-in-a-jtable-cell/5032692/

http://www.coderanch.com/t/337549/GUI/java/align-data-columns-JTable