Ejercicio resuelto: Personalizar JTable

PROBLEMA:

Se tiene un JTable con 19 columnas y 50 registros, se desea personalizar el JTable de la siguiente manera:

– Se  necesita comparar la columna 4 y 5 y si tienen el mismo valor (numérico) se debe dejar con el color actual de la fila correspondiente, pero si tienen valores diferentes la celda de la columna 5 deberá ser marcada de color rojo (ERROR).

– De acuerdo al valor que tenga la columna 10  se deberá cambiar el color de toda la fila, para un valor de «VENCIDO» el color sera de AZUL, pero si el valor es de «VIGENTE«, el color sera VERDE, para otro valor el color sera BLANCO.

Solución:

Creamos una nueva clase FormatoTabla que se extiende de DefaultTableCellRenderer.

package org.bolivia.table;
import java.awt.Color;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
/**
 * @web https://www.jc-mouse.net/
 * @author Mouse
 */
public class FormatoTabla extends DefaultTableCellRenderer{

    Color celda_error = new Color(185,63,51);
    Color vigente = new Color(138,224,132);
    Color vencido = new Color(145,175,238);
    int cc=0;
    @Override
    public Component getTableCellRendererComponent ( 
            JTable table, Object value, boolean selected, 
            boolean focused, int row, int column )
    {        
        table.setSelectionBackground(Color.BLACK);
        table.setSelectionForeground(Color.YELLOW);
        //se obtiene el valor de la columna 10
        String col10 = table.getValueAt(row, 9).toString();
        //se obtiene el valor de las columnas 4 y 5
        int col4 =  Integer.valueOf(table.getValueAt(row,3).toString() );
        int col5 =  Integer.valueOf(table.getValueAt(row,4).toString() );

        //se realiza la comparacion para la columna 10
        if( col10.equals("VIGENTE") )
        {            
            setBackground(vigente);            
        }
        else if( col10.equals("VENCIDO") )
        {
            setBackground(vencido); 
        }
        else{
            setBackground(Color.WHITE);
        }

        //se obtiene la celdas
        Component c = super.getTableCellRendererComponent(table, value, selected, focused, row, column);         
        //se realiza la comparacion para las columnas 4 y 5 
        if( col4!=col5 && column==4 )
        {   
            c.setBackground( celda_error );
        }      

        return this;
    }

}

Para implementar esta clase en nuestra tabla, hacemos lo siguiente:

DefaultTableModel TableModel = new DefaultTableModel();

        //valores de prueba
        TableModel.setDataVector(new Object[][] {
        { "1", "","","1","8","","","","","VENCIDO","","","","","","","","","" },
        { "2", "","","32","32","","","","","VENCIDO","","","","","","","","","" },
        { "3", "","","13","4","","","","","VIGENTE","","","","","","","","","" },        
        { "4", "","","1","1","","","","","VENCIDO","","","","","","","","","" },
        { "5", "","","11","5","","","","","WTF","","","","","","","","","" },
        { "6", "","","111","15","","","","","WTF","","","","","","","","","" },
        { "7", "","","84","84","","","","","","","","","","","","","","" },
        { "8", "","","31","67","","","","","VENCIDO","","","","","","","","","" },
        { "9", "","","6","8","","","","","VIGENTE","","","","","","","","","" },
        { "10", "","","61","2","","","","","VIGENTE","","","","","","","","","" },
        { "11", "","","6","8","","","","","VIGENTE","","","","","","","","","" },
        { "12", "","","8","8","","","","","WTF","","","","","","","","","" },
        { "13", "","","84","0","","","","","WTF","","","","","","","","","" },
        { "14", "","","24","75","","","","","WTF","","","","","","","","","" },
        { "15", "","","54","45","","","","","WTF","","","","","","","","","" },
        { "16", "","","74","35","","","","","WTF","","","","","","","","","" },
        { "17", "","","27","74","","","","","","","","","","","","","","" },
        { "18", "","","4","74","","","","","","","","","","","","","","" },
        { "19", "","","43","44","","","","","WTF","","","","","","","","","" },
        { "20", "","","23","54","","","","","WTF","","","","","","","","","" }}, 
                new Object[] {
               "A", "B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S" });
        jTable1.setModel(TableModel);

        FormatoTabla ft = new FormatoTabla();        
        jTable1.setDefaultRenderer (Object.class, ft );
        jTable1.setRowHeight(28);

fin 🙂