Hi i get a null pointer exception error at line 114 but i dont know how to solve it. It is a solitaire Peg game with 4 colors and you can switch between the colors. The move where i get the error is from the center (button 24) to the button two steps up it (Button 24 +- 14)
import javax.swing.*;
import java.awt.Color;
import java.awt.event.*;
public class solitair extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private boolean barriere = false;
private JButton[] board = new JButton[49];
private JButton reset;
private String[] Auswahl = { "red", "green", "black" };
private JRadioButton[] Option = new JRadioButton[3];
public solitair() {
super("Solitaire Spiel");
JPanel Platte = new JPanel();
Platte.setLayout(null);
for (int z = 0; z < 7; z++) {
for (int s = 0; s < 7; s++) {
board[z + (s * 7)] = new JButton();
board[z + (s * 7)].setSize(40, 40);
board[z + (s * 7)].setLocation(70 + (70 * z), 70 + (70 * s));
board[z + (s * 7)].addActionListener(this);
Platte.add(board[z + (s * 7)]);
setContentPane(Platte);
}
}
reset = new JButton("Neues spiel");
reset.setSize(133, 30);
reset.setLocation(33, 500);
reset.addActionListener(this);
Platte.add(reset);
ButtonGroup Gruppe = new ButtonGroup();
for (int c = 0; c < 3; c++) {
Option[c] = new JRadioButton(Auswahl[c]);
Option[c].setSize(80, 30);
Option[c].setLocation(70, 10 + (c * 40));
Option[c].addActionListener(this);
Gruppe.add(Option[c]);
Platte.add(Option[c]);
}
Option[0].setSelected(true);
setContentPane(Platte);
for (int i = 0; i <= 48; i++) {
if (i >= 2 && i <= 4)
board[i].setBackground(Color.blue);
if (i > 8 && i < 12)
board[i].setBackground(Color.blue);
if (i > 13 && i < 35)
board[i].setBackground(Color.blue);
if (i == 24)
board[i].setBackground(Color.gray);
if (i > 36 && i < 40)
board[i].setBackground(Color.blue);
if (i > 43 && i < 47)
board[i].setBackground(Color.blue);
board[0].setVisible(false);
board[1].setVisible(false);
board[5].setVisible(false);
board[6].setVisible(false);
board[7].setVisible(false);
board[8].setVisible(false);
board[12].setVisible(false);
board[13].setVisible(false);
board[35].setVisible(false);
board[36].setVisible(false);
board[40].setVisible(false);
board[41].setVisible(false);
board[42].setVisible(false);
board[43].setVisible(false);
board[47].setVisible(false);
board[48].setVisible(false);
}
}
public void actionPerformed(ActionEvent Ereignis) {
Object Quelle = Ereignis.getSource();
{
for (int i = 0; i < 49; i++) {
if (Quelle == board[i] && board[i].getBackground() == Color.blue && !barriere) {
board[i].setBackground(Color.yellow);
barriere = true;
} else if (Quelle == board[i] && board[i].getBackground() == Color.yellow
&& barriere) {
board[i].setBackground(Color.blue);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 1].getBackground() == Color.blue
&& board[i - 2].getBackground() == Color.yellow) {
board[i].setBackground(Color.blue);
board[i - 1].setBackground(Color.gray);
board[i - 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 1].getBackground() == Color.blue
&& board[i + 2].getBackground() == Color.yellow) {
board[i].setBackground(Color.blue);
board[i + 1].setBackground(Color.gray);
board[i + 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 7].getBackground() == Color.blue
&& board[i - 14].getBackground() == Color.yellow) {
board[i].setBackground(Color.blue);
board[i - 7].setBackground(Color.gray);
board[i - 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 7].getBackground() == Color.blue
&& board[i + 14].getBackground() == Color.yellow) {
board[i].setBackground(Color.blue);
board[i + 7].setBackground(Color.gray);
board[i + 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.red && !barriere) {
board[i].setBackground(Color.PINK);
barriere = true;
} else if (Quelle == board[i] && board[i].getBackground() == Color.pink
&& barriere) {
board[i].setBackground(Color.red);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 1].getBackground() == Color.red
&& board[i - 2].getBackground() == Color.pink) {
board[i].setBackground(Color.red);
board[i - 1].setBackground(Color.gray);
board[i - 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 1].getBackground() == Color.red
&& board[i + 2].getBackground() == Color.pink) {
board[i].setBackground(Color.red);
board[i + 1].setBackground(Color.gray);
board[i + 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 7].getBackground() == Color.red
&& board[i - 14].getBackground() == Color.pink) {
board[i].setBackground(Color.red);
board[i - 7].setBackground(Color.gray);
board[i - 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 7].getBackground() == Color.red
&& board[i + 14].getBackground() == Color.pink) {
board[i].setBackground(Color.red);
board[i + 7].setBackground(Color.gray);
board[i + 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.green && !barriere) {
board[i].setBackground(Color.magenta);
barriere = true;
} else if (Quelle == board[i] && board[i].getBackground() == Color.magenta
&& barriere) {
board[i].setBackground(Color.green);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 1].getBackground() == Color.green
&& board[i - 2].getBackground() == Color.magenta) {
board[i].setBackground(Color.green);
board[i - 1].setBackground(Color.gray);
board[i - 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 1].getBackground() == Color.green
&& board[i + 2].getBackground() == Color.magenta) {
board[i].setBackground(Color.green);
board[i + 1].setBackground(Color.gray);
board[i + 2].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i - 7].getBackground() == Color.green
&& board[i - 14].getBackground() == Color.magenta) {
board[i].setBackground(Color.green);
board[i - 7].setBackground(Color.gray);
board[i - 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.gray
&& board[i + 7].getBackground() == Color.green
&& board[i + 14].getBackground() == Color.magenta) {
board[i].setBackground(Color.green);
board[i + 7].setBackground(Color.gray);
board[i + 14].setBackground(Color.gray);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.black && !barriere) {
board[i].setBackground(Color.CYAN);
barriere = true;
} else if (Quelle == board[i] && board[i].getBackground() == Color.cyan
&& barriere) {
board[i].setBackground(Color.black);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.white
&& board[i - 1].getBackground() == Color.black
&& board[i - 2].getBackground() == Color.cyan) {
board[i].setBackground(Color.black);
board[i - 1].setBackground(Color.white);
board[i - 2].setBackground(Color.white);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.white
&& board[i + 1].getBackground() == Color.black
&& board[i + 2].getBackground() == Color.cyan) {
board[i].setBackground(Color.black);
board[i + 1].setBackground(Color.white);
board[i + 2].setBackground(Color.white);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.white
&& board[i - 7].getBackground() == Color.black
&& board[i - 14].getBackground() == Color.cyan) {
board[i].setBackground(Color.black);
board[i - 7].setBackground(Color.white);
board[i - 14].setBackground(Color.white);
barriere = false;
}
if (Quelle == board[i] && board[i].getBackground() == Color.white
&& board[i + 7].getBackground() == Color.black
&& board[i + 14].getBackground() == Color.cyan) {
board[i].setBackground(Color.black);
board[i + 7].setBackground(Color.white);
board[i + 14].setBackground(Color.white);
barriere = false;
}
if (Quelle == reset) {
if (i >= 2 && i <= 4)
board[i].setBackground(Color.blue);
if (i > 8 && i < 12)
board[i].setBackground(Color.blue);
if (i > 13 && i < 35)
board[i].setBackground(Color.blue);
if (i == 24)
board[i].setBackground(Color.gray);
if (i > 36 && i < 40)
board[i].setBackground(Color.blue);
if (i > 43 && i < 47)
board[i].setBackground(Color.blue);
}
for (int c = 0; c < 3; c++) {
if (Quelle == Option[c]) {
if (c == 0) {
if (i >= 2 && i <= 4)
board[i].setBackground(Color.red);
if (i > 8 && i < 12)
board[i].setBackground(Color.red);
if (i > 13 && i < 35)
board[i].setBackground(Color.red);
if (i == 24)
board[i].setBackground(Color.gray);
if (i > 36 && i < 40)
board[i].setBackground(Color.red);
if (i > 43 && i < 47)
board[i].setBackground(Color.red);
}
if (c == 1) {
if (i >= 2 && i <= 4)
board[i].setBackground(Color.green);
if (i > 8 && i < 12)
board[i].setBackground(Color.green);
if (i > 13 && i < 35)
board[i].setBackground(Color.green);
if (i == 24)
board[i].setBackground(Color.gray);
if (i > 36 && i < 40)
board[i].setBackground(Color.green);
if (i > 43 && i < 47)
board[i].setBackground(Color.green);
}
if (c == 2) {
if (i >= 2 && i <= 4)
board[i].setBackground(Color.black);
if (i > 8 && i < 12)
board[i].setBackground(Color.black);
if (i > 13 && i < 35)
board[i].setBackground(Color.black);
if (i == 24)
board[i].setBackground(Color.white);
if (i > 36 && i < 40)
board[i].setBackground(Color.black);
if (i > 43 && i < 47)
board[i].setBackground(Color.black);
}
}
}
}
}
}
// Das Fenster wird geschlossen wenn man auf die X drückt
public static void main(String[] args) {
solitair Fenster = new solitair();
Fenster.setSize(700, 600);
Fenster.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Fenster.setVisible(true);
}
}
