How to Refresh the Background Color of a Row in a JTable?-javaTutorial-php.cn

How to Refresh the Background Color of a Row in a JTable?

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Release： 2024-11-22 07:23:11

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How to Refresh the Background Color of a Row in a JTable?

Refreshing Background Color for a Row in JTable

Issue:
When attempting to refresh the background color of a row in a JTable, it only works on the first iteration and fails subsequently.

Solution:

The issue arises because the setRowColor method in the ColorTable class is not resetting the background color for subsequent rows. To resolve this, the code should be modified as follows:

public void resetColor(Color color) {
    for (int i = 0; i < this.getRowCount(); i++) {
        // Reset all rows to the specified color
        this.setRowColor(i, color);
    }
}

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In addition, to prevent the selected rows from being colored, the following line should be added within the prepareRenderer method:

if (rowSelection != null &amp;&amp; isRowSelected(row)) {
    continue;
}

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This ensures that selected rows maintain their default background color.

Example Code:

// Import necessary libraries...

public class ColorTable extends JTable {

    private static final long serialVersionUID = 1L;
    private Map rowColor = new HashMap();
    private Map columnColor = new HashMap();
    private Color cellColor;
    private Color defaultColor;

    public ColorTable(TableModel model) {
        super(model);
    }

    public void setRowColor(int row, Color c) {
        rowColor.put(new Integer(row), c);
    }

    // ... Other methods remain the same ...

    @Override
    public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {

        Component c = super.prepareRenderer(renderer, row, column);
        if (defaultColor == null) {
            defaultColor = c.getBackground();
        }

        // Color order is as follows:
        // rowSelection, checkBox toggle for row color, column color, cell color
        if (rowSelection != null &amp;&amp; isRowSelected(row)) {
            continue;
        }

        // ...

        return c;
    }

    // ... Other methods remain the same ...

}

// ... Other code remains the same ...

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