TableForPrice.java

//this is my current code
//how do i make it bold?
//http://stackoverflow.com/questions/41102850/changing-jtable-row-font-to-bold/41103969

import java.awt.Component;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.JLabel;

@SuppressWarnings("serial")
public class TableForPrice extends JPanel {
	int minPeople = 10;
	int maxPeople = 36;
	int carersNum = 2;
	int packageType;
	int NumPeople = Integer.parseInt(JOptionPane.showInputDialog("How many people want to go to the outing?"));

	JTable jt;

	public TableForPrice() {
		if (NumPeople > 24) {
			carersNum = 3;
		}
		NumPeople = NumPeople + carersNum;
		JOptionPane.showMessageDialog(null,
				"The number of people has been updated to " + NumPeople + " to include the carers");

		// end the program if there is out of range people
		if (NumPeople < 10) {
			JOptionPane.showMessageDialog(null, "There are not enough people for the outing");
			System.exit(0);
		} else if (NumPeople > 36) {
			JOptionPane.showMessageDialog(null, "There are too many people for the outing");
			System.exit(0);
		}

		// type of package - small/medium/large
		if (NumPeople <= 16) {
			packageType = 1;
		} else if (NumPeople <= 26) {
			packageType = 2;
		} else {
			packageType = 3;
		}

		double priceT1 = 0.0;
		// calculate price Task 1
		if (packageType == 1) {
			priceT1 = (NumPeople * 14) + (NumPeople * 21) + 150;
		} else if (packageType == 2) {
			priceT1 = (NumPeople * 13.5) + (NumPeople * 20) + 190;
		} else if (packageType == 3) {
			priceT1 = (NumPeople * 13) + (NumPeople * 19) + 225;
		}

		String[] columns = { "Number of People", "Hire of Coach", "Cost per meal", "Cost per theatre ticket" };

		String[][] data = { { "12-16", "$150", "$14", "$21" }, { "17-26", "$190", "$13.50", "$20" },
				{ "27-39", "$225", "$13", "$19" } };

		// add JLabels to show the "total cost for x people"
		JLabel lblTotalCostFor = new JLabel("Total Cost for");
		JLabel numPeople = new JLabel(String.valueOf(NumPeople));
		JLabel People = new JLabel("People: $");
		JLabel Price = new JLabel(String.valueOf(priceT1));

		jt = new JTable(data, columns) {
			public boolean isCellEditable(int data, int columns) {
				return false;
			}

			public Component prepareRenderer(TableCellRenderer r, int data, int columns) {
				Component c = super.prepareRenderer(r, data, columns);

				return c;
			}
		};
		jt.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);

		jt.setPreferredScrollableViewportSize(new Dimension(540, 48));
		jt.setFillsViewportHeight(true);

		JScrollPane jps = new JScrollPane(jt);

		// the items are shown in order so they need to be added in order
		add(jps);
		add(lblTotalCostFor);
		add(numPeople);
		add(People);
		add(Price);

	}

	public static void main(String[] args) {
		JFrame jf = new JFrame("Cost of Outing");
		TableForPrice t = new TableForPrice();
		jf.setSize(570, 250);
		jf.setVisible(true);
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.getContentPane().add(t);
	}

}