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我在嘗試瞭解MouseActionListener/Adapter類以及圖形，並且我認爲我會通過創建井字遊戲來做到這一點。我不想使用JButtons，因爲我只是改變按鈕上的措辭而不是繪製圖形圖像。 我無法讓我的面板繪製圖像。我爲JPanels創建了兩個內部類，一個用於MouseAdapter類。我的paint方法位於Board類中，但是當我單擊JPanel時，它不繪製圖形（到目前爲止，我只是設置繪製一個X）。 我知道它認識到通過使用調試器點擊面板，但我不明白爲什麼調用時不調用paint方法。無法在JPanel上繪圖
這裏是我的代碼：
package xno;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics.*;
/**
*
* @author jordynsmith
*/
public class XnOFrame extends JFrame {
private int win=0;
private int loss=0;
private int turn=1; //keeps track of the turn so that color can change with each turn
public XnOFrame(){
super("X n' O");
//instantiate
board = new Board[3][3];
for(int i=0 ;i< 3; i++){
for(int j=0; j<3; j++){
board[i][j] = new Board();
board[i][j].setStatus("Empty");
board[i][j].setBackground(Color.black);
//creates tic tac toe border
//1st column
if(j==0){//top
board[i][j].setBorder(BorderFactory.createMatteBorder(0, 0, 2, 2, Color.blue));
if(i==1){//center
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 0, 2, 0, Color.blue));
}
if(i==2){//bottom
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 0, 0, 0, Color.blue));
}
}
//2nd column
else if(j==1){//top
board[i][j].setBorder(BorderFactory.createMatteBorder(0, 2, 2, 2, Color.blue));
if(i==1){//center
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 2, 2, 2, Color.blue));
}
if(i==2){//bottom
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 2, 0, 2, Color.blue));
}
}
//3rd column
else if(j==2){//top
board[i][j].setBorder(BorderFactory.createMatteBorder(0, 2, 2, 0, Color.blue));
if(i==1){//center
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 2, 2, 0, Color.blue));
}
if(i==2){//bottom
board[i][j].setBorder(BorderFactory.createMatteBorder(2, 2, 0, 0, Color.blue));
}
}
}
}
goBtn = new JButton("Start Game");
quitBtn = new JButton("End Game");
newBtn = new JButton("New Game");
score = new JLabel("Score");
wins = new JLabel("Wins");
losses = new JLabel("Losses");
wPoints = new JLabel(win + "");
lPoints = new JLabel(loss + "");
line = new JLabel("||");
menuPanel = new JPanel();
scorePanel = new JPanel();
gridPanel = new JPanel();
scoreLabelPanel = new JPanel();
pointsPanel = new JPanel();
//set layout
this.setLayout(new BorderLayout());
menuPanel.setLayout(new FlowLayout());
scorePanel.setLayout(new BorderLayout());
gridPanel.setLayout(new GridLayout(3,3));
scoreLabelPanel.setLayout(new FlowLayout());
pointsPanel.setLayout(new FlowLayout());
//add components
this.add(gridPanel, BorderLayout.CENTER);
this.add(menuPanel, BorderLayout.SOUTH);
this.add(scorePanel, BorderLayout.WEST);
menuPanel.add(goBtn);
menuPanel.add(quitBtn);
menuPanel.add(newBtn);
scorePanel.add(scoreLabelPanel, BorderLayout.NORTH);
scorePanel.add(pointsPanel, BorderLayout.CENTER);
scoreLabelPanel.add(score);
pointsPanel.add(wins);
pointsPanel.add(wPoints);
pointsPanel.add(line);
pointsPanel.add(losses);
pointsPanel.add(lPoints);
for(int i=0; i<board.length; i++){
for(int j=0; j<board[i].length; j++){
gridPanel.add(board[i][j]);
}
}
//adding action
for(int i=0; i<board.length; i++){
for(int j=0; j<board[i].length; j++){
board[i][j].addMouseListener(new BoardAction());
}
}
}
這是我的問題確實是。我不確定如何組織和何時調用某些方法，以及應該調用哪些方法才能使其工作。
private class BoardAction extends MouseAdapter{
private Board panel = new Board();
@Override
public void mouseClicked(MouseEvent me){
//determines which panel was clicked
panel = (Board) me.getSource();
panel.repaint();//calls paint method
}
}
private class Board extends JPanel{
public String status;
public Board(){
status="Empty";
}
public String getStatus(){
return status;
}
public void setStatus(String s){
status = s;
}
public void piant(Graphics g){
super.paint(g);
draw(g);
}
private void draw(Graphics g){
if(status.equals("Empty")){//paints x if empty
if(turn%2 != 0){//if turn is odd the color is green
g.setColor(Color.green);
}
else//if even the color is yellow
g.setColor(Color.yellow);
g.drawLine(0, 0, getWidth(), getHeight());
g.drawLine(getHeight(), 0, getWidth(), 0);
setStatus("X");
}
}
}
//components
Board [][] board;
JPanel menuPanel, scorePanel, gridPanel, scoreLabelPanel, pointsPanel;
JButton goBtn, quitBtn, newBtn;
JLabel score, wins, losses, wPoints, lPoints, line;
}
因此改變我的paint方法來一個的paintComponent後的StackOverflowError當super.paint（）方法被調用時拋出我的Jbutton將採取永遠出現。爲了看看會發生什麼，我評論說，排隊並運行程序。在這樣做，我得到這個：
黑色面板是我點擊的人。面板應該是黑色的，點擊時綠色的線條應該顯示出來。另外，只有一條綠線出現（應該有兩條，因爲它是一個x）。我正在盡我所能按照教程，但任何額外的幫助，非常感謝！
1.不要在'BorderActon'中創建'Board'的新實例，不需要它; 2.用'paint'替代'paintComponent'; 3。據推測，你BoardAction'實際上應該以一種有意義的方式改變'Board'的狀態 – MadProgrammer