所以，我正在研究一个项目，我的GUI似乎提出了4个错误。这些错误指向我添加动作侦听器的位置。我不确定如何解决这个问题。这是我的代码：
import javax.swing.*;
import java.awt.*;
public class GUIDisplay extends JFrame implements Display {
//declearing global variables and J items.
protected ReversiBoard board;
protected JLabel rowL, colL, gameOverLabel1,gameOverLabel2,message1Label,
message2Label;
protected JTextField rowField, columnField;
protected JButton moveButton, saveButton, startButton, quitButton;
protected Canvas myCanvas;
protected GUIDisplay myDisplay = new GUIDisplay(board);
public GUIDisplay(ReversiBoard inBoard){
board = inBoard;
}
//Simple message
public void displayMessage(String message){
message1Label = new JLabel(message);
}
//player status such as your turn
public void displayStatus(Player inPlayer, String message){
message2Label = new JLabel(inPlayer.getName() + ", " + message);
}
//end game messages
public void displayWinner(Player winner){
if (winner == null)
{
gameOverLabel1 = new JLabel("Tie Game!");
}
else
{
gameOverLabel2 = new JLabel("Winner: " + winner);
}
}
public void drawBoard(Graphics g){
//set controls the scale of the board
int set = 60;
int size = board.getSize();
//creating umbered lines
for (int c = 1; c <= size + 1; c++){
g.drawString("" + (c - 1), set/2, c*set + set/2);
g.drawString("" + (c - 1), c * set + set/2, set/2);
}
//places pieces
for(int c = 0; c < size; c++) {
for(int i = 0; i < size; i++){
int p = board.getPiece(i, j).getType();
if (p != Piece.BLANK){
if (p == Piece.BLACKPIECE){
g.setColor(Color.BLACK);
}
else{
g.setColor(Color.WHITE);
}
g.fillOval(set + set * i + 10, set + set * c + 10,
set - 20, set - 20);
}
}
}
}
//gets the move
public Move getMove(Player p){
int row, col;
row = Integer.parseInt(rowField.getText());
col = Integer.parseInt(columnField.getText());
Move m = new Move(p, row, col);
return m;
}
//Setting for graphics
public void setGraphics(){
Container pane = getContentPane();
pane.setLayout(new BorderLayout());
myCanvas = new Canvas(){
public void boardStart(Graphis g){
super.paint(g);
drawBoard(g);
}
};
//Setting buttons
moveButton = new JButton("Move!");
saveButton = new JButton("Save!");
startButton = new JButton("Start!");
quitButton = new JButton("Quit!");
//Seting labels
rowL = new JLabel("Row");
colL = new JLabel("Column");
gameOverLabel1 = new JLabel("");
gameOverLabel2 = new JLabel("");
message1Label = new JLabel("");
message2Label = new JLabel("");
//Setting text fields
rowTF = new JTextField();
columnTF = new JTextField();
//Adding canvas
pane.add(myCanvas, BoarderLayout.CENTER);
//Modifyibg Canvas
myCanvas.setBackground(Color.GREEN);
//Adding JPanel
JPanel paneComp = new JPanel();
paneComp.setLayout(new GridLayout(0, 2));
paneComp.add(gameOverLabel1);
paneComp.add(gameOverLabel2);
paneComp.add(message1Label);
paneComp.add(message2Label);
paneComp.add(rowL);
paneComp.add(rowTF);
paneComp.add(colL);
paneComp.add(columnTF);
paneComp.add(moveButton);
paneComp.add(saveButton);
paneComp.add(startButton);
paneComp.add(quitButton);
//Setting non-start items to false
moveButton.setEnabled(false);
saveButton.setEnabled(false);
rowTF.setEnabled(false);
columnTF.setEnabled(false);
//Adding Listeners
moveButton.addActionListener(new GameActionListener);
saveButton.addActionListener(new GameActionListener);
startButton.addActionListener(new GameActionListener);
quitButton.addActionListener(new GameActionListener);
//Setting bascs for the GUI
setTitle("Reversi Game!");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(1000, 800);
pane.setBackground(Color.GRAY);
}
//inner class for action listener
class GameActionListener implements ActionListener {
public void actionPerformed(ActionEvent event){
String command = event.getActionCommand();
//quit game
if (command == "Quit!"){
System.exit(0);
}
else if (command == "Start!"){
//Enable the buttons for use
rowTF.setEnabled(true);
columnTF.setEnabled(true);
moveButton.setEnabled(true);
saveButton.setEnabled(true);
startButton.setEnabled(false);
}
//save game
else if (command == "Save!"){
board.saveGame(JOptionPane.showInputDialog(this, "Game Name"));
displayMessage("Saved!");
}
//makes moce
else if (command == "Move!"){
Move m = getMove(board.getCurrentPlayer());
//test if move is legal
if(board.moveLegal(m) == true){
board.makeMove(m);
board.setCurrentPlayer(board.getNExtPlayer());
myCanvas.repaint();
}
//illegal move
else
displayStatus("Illegal Move!");
displayStatus(board.geCurrentPlayer(), "Your Move!");
//game over
if (board.gameOver()){
Player p = board.getWinner();
displayWinner(p);
//Setting items to false when game ends
rowTF.setEnabled(false);
columnTF.setEnabled(false);
moveButton.setEnabled(false);
saveButton.setEnabled(false);
startButton.setEnabled(false);
}
//Skip turn
if (board.moveExist(board.getCurrentPlayer()) == false)
board.setCurrentPlayer(board.getNextPlayer());
}
}
}
}
以下是我在编译时收到的错误： ---- jGRASP exec：javac -g GUIDisplay.java
GUIDisplay.java:111：错误：'（'或'['预期 moveButton.addActionListener（new GameActionListener）; ^ GUIDisplay.java:112：错误：'（'或'['预期 saveButton.addActionListener（new GameActionListener）; ^ GUIDisplay.java:113：错误：'（'或'['预期 startButton.addActionListener（new GameActionListener）; ^ GUIDisplay.java:114：错误：'（'或'['预期 quitButton.addActionListener（new GameActionListener）; ^ 4个错误
---- jGRASP wedge2：进程的退出代码为1。 ---- jGRASP：操作完成。
非常感谢您的帮助。
答案 0 :(得分：1)
GameActionListener是一个类，因此当您创建新实例时，您可能希望像new GameActionListener()