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Идея здесь заключается в создании сетки ящиков. под черной сеткой - еще одна сетка разноцветных коробок. когда вы нажимаете кнопку, исчезает маска, показывающая цветную рамку внизу. Затем вы выбираете второй квадрат, если цвета соответствуют ура, если нет, то игра продолжается. Вот код для GuessingGame.javaJava - почему маска не работает?
import java.applet.Applet;
import java.awt.Button;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class GuessingGame extends Applet{
/**
*
*/
private static final long serialVersionUID = 1L;
private final int START_X = 20;
private final int START_Y = 40;
private final int ROWS = 4;
private final int COLS = 4;
private final int BOX_WIDTH = 20;
private final int BOX_HEIGHT = 20;
//this is used to keep track of boxes that have been matched.
private boolean matchedBoxes[][];
//this is used to keep track of two boxes that have been clicked.
private MaskableBox chosenBoxes[];
private MaskableBox boxes[][];
private Color boxColors[][];
private Button resetButton;
public void init() {
boxes = new MaskableBox[ROWS][COLS];
boxColors = new Color[ROWS][COLS];
resetButton = new Button("Reset Colors");
resetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
randomizeColors();
buildBoxes();
repaint();
}
});
add(resetButton);
//separate building colors so we can add a button later
//to re-randomize them.
randomizeColors();
buildBoxes();
}
public void paint(Graphics g) {
for (int row =0; row < boxes.length; row ++) {
for (int col = 0; col < boxes[row].length; col++) {
if(boxes[row][col].isClicked()) {
//boxes[row][col].setMaskColor(Color.black);
//boxes[row][col].setMask(!boxes[row][col].isMask());
//boxes[row][col].setClicked(false);
//}
if (!matchedBoxes[row][col]) {
gameLogic(boxes[row][col]);
//boxes[row][col].draw(g);
}
}
}
}
//loop through the boxes and draw them.
for (int row = 0; row < boxes.length; row++) {
for (int col = 0; col < boxes[row].length; col++) {
boxes[row][col].draw(g);
}
}
}
public void gameLogic(MaskableBox box) {
if ((chosenBoxes[0] != null)&&(chosenBoxes[1] != null)) {
chosenBoxes = new MaskableBox[2];
if(chosenBoxes[0].getBackColor() == chosenBoxes[1].getBackColor()) {
for (int i=0; 0 < 2; ++i) {
for(int row = 0; row < boxes.length; row++) {
for(int col = 0; col < boxes[row].length; col++) {
if(boxes[row][col] == chosenBoxes[i]) {
System.out.println("boxes [row][col] == chosenBoxes[] at index: " + i );
matchedBoxes[row][col] = true;
break;
}
}
}
}
}else {
chosenBoxes[0].setMask(true);
chosenBoxes[1].setMask(true);
}
}else {
if (chosenBoxes[0] == null) {
chosenBoxes[0] = box;
chosenBoxes[0].setMask(false);
return;
}else{
if (chosenBoxes[1] == null) {
chosenBoxes[1] = box;
chosenBoxes[1].setMask(false);
}
}
}
}
private void removeMouseListeners() {
for(int row = 0; row < boxes.length; row ++) {
for(int col = 0; col < boxes[row].length; col++) {
removeMouseListener(boxes[row][col]);
}
}
}
private void buildBoxes() {
// need to clear any chosen boxes when building new array.
chosenBoxes = new MaskableBox[2];
// create a new matchedBoxes array
matchedBoxes = new boolean [ROWS][COLS];
removeMouseListeners();
for(int row = 0; row < boxes.length; row++) {
for(int col = 0; col < boxes[row].length; col++) {
boxes[row][col] =
new MaskableBox(START_X + col * BOX_WIDTH,
START_Y + row * BOX_HEIGHT,
BOX_WIDTH,
BOX_HEIGHT,
Color.gray,
boxColors[row][col],
true,
true,
this);
addMouseListener(boxes[row][col]);
}
}
}
private void randomizeColors() {
int[] chosenColors = {0,0,0,0,0,0,0,0};
Color[] availableColors = {Color.red, Color.blue, Color.green,
Color.yellow, Color.cyan, Color.magenta, Color.pink, Color.orange };
for(int row = 0; row < boxes.length; row++) {
for (int col = 0; col < boxes[row].length; col++) {
for (;;) {
int rnd = (int) (Math.random() * 8);
if (chosenColors[rnd]< 2) {
chosenColors[rnd]++;
boxColors[row][col] = availableColors[rnd];
break;
}
}
}
}
}
}
здесь вторая партия кода, содержащего maskablebox
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
public class MaskableBox extends ClickableBox {
private boolean mask;
private Color maskColor;
Container parent;
public MaskableBox(int x, int y, int width, int height, Color borderColor,
Color backColor, boolean drawBorder, boolean mask, Container parent) {
super(x, y, width, height, borderColor, backColor, drawBorder, parent);
this.parent = parent;
this.mask = mask;
}
public void draw(Graphics g) {
if(mask=false) {
super.draw(g);
// setOldColor(g.getColor());
// g.setColor(maskColor);
// g.fillRect(getX(),getY(),getWidth(), getHeight());
// if(isDrawBorder()) {
// g.setColor(getBorderColor());
// g.drawRect(getX(),getY(),getWidth(),getHeight());
// }
// g.setColor(getOldColor());
}else {
if(mask=true) {
//super.draw(g);
setOldColor(g.getColor());
g.setColor(maskColor);
g.fillRect(getX(),getY(),getWidth(), getHeight());
if(isDrawBorder()) {
g.setColor(getBorderColor());
g.drawRect(getX(),getY(),getWidth(),getHeight());
}
g.setColor(getOldColor());
}
}
}
public boolean isMask() {
return mask;
}
public void setMask(boolean mask) {
this.mask = mask;
}
public Color getMaskColor() {
return maskColor;
}
public void setMaskColor(Color maskColor) {
this.maskColor = maskColor;
}
}
теперь я получаю эти сообщения об ошибках.
Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
at GuessingGame.gameLogic(GuessingGame.java:74)
at GuessingGame.paint(GuessingGame.java:55)
at java.awt.Container.update(Container.java:1801)
at sun.awt.RepaintArea.updateComponent(RepaintArea.java:239)
at sun.awt.RepaintArea.paint(RepaintArea.java:216)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:306)
at java.awt.Component.dispatchEventImpl(Component.java:4706)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)