Preferences.java

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import java.awt.Color;
import java.awt.Font;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.JTableHeader;

public class Preferences {
    public void changeUI() {
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Windows".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public void tablePreference(JTable jTable) {
        System.out.println("header changed");
        // Change Header.
        JTableHeader tj = jTable.getTableHeader();
        tj.setFont(new Font("Segoe UI", Font.BOLD, 26));
        tj.setOpaque(false);
        tj.setBackground(new Color(32, 136, 203));
        tj.setForeground(new Color(255, 255, 255));

        System.out.println("Column align");
        // Column Center align.
        DefaultTableCellRenderer renderer = (DefaultTableCellRenderer) tj.getDefaultRenderer();
        renderer.setHorizontalAlignment(JLabel.CENTER);

        System.out.println("Cell align");
        // Cell Alignment
        DefaultTableCellRenderer cellRenderer = new DefaultTableCellRenderer();
        cellRenderer.setHorizontalAlignment(JLabel.CENTER);
        jTable.getColumnModel().getColumn(0).setCellRenderer(cellRenderer);
        jTable.getColumnModel().getColumn(1).setCellRenderer(cellRenderer);
        jTable.getColumnModel().getColumn(2).setCellRenderer(cellRenderer);
        jTable.getColumnModel().getColumn(3).setCellRenderer(cellRenderer);

        jTable.setAutoCreateRowSorter(true);
        jTable.setFont(new java.awt.Font("Calibri", 0, 24)); // NOI18N
        jTable.setAutoResizeMode(javax.swing.JTable.AUTO_RESIZE_LAST_COLUMN);
        jTable.setRowHeight(30);
        jTable.setRowMargin(2);
        jTable.setSelectionBackground(new java.awt.Color(102, 255, 51));
        jTable.setSurrendersFocusOnKeystroke(true);

    }
}