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/**
* @version 1.00 1999-07-17
* @author Cay Horstmann
*/
import java.awt.Container;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;
public class InvestmentTable {
public static void main(String[] args) {
JFrame frame = new InvestmentTableFrame();
frame.show();
}
}
/*
* this data model computes the cell entries each time they are requested
*/
class InvestmentTableModel extends AbstractTableModel {
public InvestmentTableModel(int y, int r1, int r2) {
years = y;
minRate = r1;
maxRate = r2;
}
public int getRowCount() {
return years;
}
public int getColumnCount() {
return maxRate - minRate + 1;
}
public Object getValueAt(int r, int c) {
double rate = (c + minRate) / 100.0;
int nperiods = r;
double futureBalance = INITIAL_BALANCE * Math.pow(1 + rate, nperiods);
return NumberFormat.getCurrencyInstance().format(futureBalance);
}
public String getColumnName(int c) {
double rate = (c + minRate) / 100.0;
return NumberFormat.getPercentInstance().format(rate);
}
private int years;
private int minRate;
private int maxRate;
private static double INITIAL_BALANCE = 100000.0;
}
class InvestmentTableFrame extends JFrame {
public InvestmentTableFrame() {
setTitle("InvestmentTable");
setSize(300, 200);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
TableModel model = new InvestmentTableModel(30, 5, 10);
JTable table = new JTable(model);
Container contentPane = getContentPane();
contentPane.add(new JScrollPane(table), "Center");
}
}
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