我制作的游戏中有一个名为move（int x1，int y1，int x2，int y2）的方法，它从第一个按钮（x1，y1）移动棋子并将其放在第二个按钮上（x2， Y2）
我如何在GUI中编写方法，当我按下第一个他等待第二个应用移动？ p.s（动作完成时按钮图标应该改变）
这是我到目前为止写的：
package eg.edu.guc.dvonn.gui;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import eg.edu.guc.dvonn.engine.Board;
public class FirstWindow extends JFrame implements ActionListener, MouseListener {
JButton Startbutton;
JPanel welcomePanel;
JPanel SecondPanel;
JPanel StandardPanel;
JPanel custPanel;
JPanel panelFill;
JButton Standard;
JButton fill;
JButton put;
JButton clear;
JButton cust;
JButton beginGame;
JButton clickedButton = null;
JLabel label;
JLabel put2;
TextField rows;
TextField col;
Board b;
JButton[][] button;
int r1;
int cc;
Icon red = new ImageIcon(getClass().getResource("index.jpg"));
Icon Black=new ImageIcon(getClass().getResource("black.jpg"));
Icon white= new ImageIcon(getClass().getResource("images.jpg"));
public FirstWindow(){
setSize(800,600);
setVisible(true);
setLayout(new BorderLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
welcomePanel = new JPanel();
welcomePanel.setLayout(new BorderLayout());
label = new JLabel("Welcome to Dvonn");
welcomePanel.add(label, BorderLayout.NORTH);
welcomePanel.setVisible(true);
label.setForeground(Color.RED);
label.setFont(new Font("Serif", Font.PLAIN, 40));
Startbutton = new JButton ("Start");
Startbutton.setBackground(Color.BLACK);
Startbutton.setForeground(Color.RED);
Startbutton.setFont(new Font("Times New Roman", Font.PLAIN, 40));
Startbutton.setPreferredSize(new Dimension(120,40));
welcomePanel.add(Startbutton, BorderLayout.CENTER);
add(welcomePanel);
Startbutton.addActionListener(this);
SecondPanel = new JPanel();
SecondPanel.setVisible(false);
SecondPanel.setSize(400,400);
rows = new TextField();
col= new TextField();
SecondPanel.add(rows);
SecondPanel.add(col);
fill = new JButton("Fill random");
fill.addActionListener(this);
fill.setBackground(Color.LIGHT_GRAY);
fill.setForeground(Color.BLUE);
/*
put = new JButton("Put");
put.setBackground(Color.LIGHT_GRAY);
put.setForeground(Color.BLUE);
*/
put2 = new JLabel("Place Pieaces Manually on the Board or Choose Fill Random");
put2.setBackground(Color.LIGHT_GRAY);
put2.setForeground(Color.BLUE);
clear = new JButton("Clear Board");
clear.addActionListener(this);
clear.setBackground(Color.LIGHT_GRAY);
clear.setForeground(Color.BLUE);
beginGame = new JButton("Start The Game");
beginGame.addActionListener(this);
beginGame.setBackground(Color.LIGHT_GRAY);
beginGame.setForeground(Color.BLUE);
beginGame.setVisible(false);
Standard = new JButton("Standardised board");
Standard.setBackground(Color.LIGHT_GRAY);
Standard.setForeground(Color.BLUE);
Standard.addActionListener(this);
Standard.addMouseListener(this);
cust = new JButton("customized");
cust.setBackground(Color.LIGHT_GRAY);
cust.setForeground(Color.BLUE);
cust.addActionListener(this);
cust.addMouseListener(this);
panelFill = new JPanel();
panelFill.add(fill);
// panelFill.add(put2);
panelFill.add(clear);
panelFill.add(beginGame);
SecondPanel.add(Standard);
SecondPanel.add(cust);
this.r1 =5;
this.cc = 11;
b = new Board(r1,cc);
button = new JButton [r1][cc];
StandardPanel = new JPanel();
StandardPanel.setBackground(Color.WHITE);
StandardPanel.setLayout(new GridLayout(r1, cc));
for (int i = 0; i <= r1 - 1; i++) {
for (int j = 0; j <= cc - 1; j++) {
button[i][j] = new JButton("Place");
button[i][j].addActionListener(this);
}
}
for (int i = 0; i <= r1 - 1; i++) {
for (int j = 0; j <= cc - 1; j++) {
button[i][j].setLayout(new FlowLayout());
button[i][j].setBackground(Color.WHITE);
StandardPanel.add(button[i][j], i, j);
}
}
}
public FirstWindow(int row,int cols){
setSize(800,600);
setVisible(true);
setLayout(new BorderLayout());
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
fill = new JButton("fill random");
fill.addActionListener(this);
fill.setBackground(Color.LIGHT_GRAY);
fill.setForeground(Color.BLUE);
/*
put = new JButton("put");
put.setBackground(Color.LIGHT_GRAY);
put.setForeground(Color.BLUE);
*/
put2 = new JLabel("Place Pieaces Manually on the Board or Choose Fill Random");
put2.setBackground(Color.LIGHT_GRAY);
put2.setForeground(Color.BLUE);
clear = new JButton("Clear Board");
clear.addActionListener(this);
clear.setBackground(Color.LIGHT_GRAY);
clear.setForeground(Color.BLUE);
Standard = new JButton("Standardised board");
Standard.setBackground(Color.LIGHT_GRAY);
Standard.setForeground(Color.BLUE);
Standard.addActionListener(this);
Standard.addMouseListener(this);
cust = new JButton("customized");
cust.setBackground(Color.LIGHT_GRAY);
cust.setForeground(Color.BLUE);
cust.addActionListener(this);
cust.addMouseListener(this);
panelFill = new JPanel();
panelFill.add(fill);
// panelFill.add(put2);
panelFill.add(clear);
this.r1 = row;
this.cc = cols;
b = new Board(r1,cc);
button = new JButton [r1][cc];
custPanel = new JPanel();
custPanel.setBackground(Color.WHITE);
custPanel.setLayout(new GridLayout(r1, cc));
for (int i = 0; i <= r1 - 1; i++) {
for (int j = 0; j <= cc - 1; j++) {
button[i][j] = new JButton("Place");
button[i][j].addActionListener(this);
}
}
for (int i = 0; i <= r1 - 1; i++) {
for (int j = 0; j <= cc - 1; j++) {
button[i][j].setLayout(new FlowLayout());
button[i][j].setBackground(Color.WHITE);
custPanel.add(button[i][j], i, j);
}
}
add(custPanel);
add(panelFill,BorderLayout.SOUTH);
}
public boolean checkBoard() { // checks if the board is full or not to start the game and the move process
// boolean fullBoard = false;
for (int i = 0; i < this.r1; i++) {
for ( int j = 0; j < this.cc; j++) {
if(button[i][j].getIcon() == null) {
return true;
}
}
}
return false;
}
public static void main (String [] args){
FirstWindow window = new FirstWindow();
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource()==Startbutton){
this.remove(welcomePanel);
this.add(SecondPanel);
SecondPanel.setVisible(true);
//this.add(SecondPanel);
JLabel label1 = new JLabel("dvonn");
label1.setForeground(Color.RED);
label1.setFont(new Font("Serif", Font.PLAIN, 25));
SecondPanel.add(label1);
}
if(e.getSource()== cust){
String rowText = rows.getText();
String colText = col.getText();
r1 = Integer.parseInt(rowText);
cc = Integer.parseInt(colText);
this.setVisible(false);
FirstWindow custom = new FirstWindow(r1, cc);
}
if(e.getSource()==Standard){ //places the standard panel
SecondPanel.setVisible(false); // set the second panel invisible
this.add(StandardPanel); //to add the panel with the buttons
StandardPanel.setVisible(true);
add(put2, BorderLayout.NORTH);
add(panelFill,BorderLayout.SOUTH);
add(StandardPanel,BorderLayout.CENTER);
}
if (e.getSource() == fill) { //randomly fills the board
b.fillRandom();
for (int i = 0; i <=r1-1; i++) {
for (int j = 0; j <=cc-1; j++) {
if (b.getColor(i, j)==0){
button[i][j].setIcon(red);
} else if (b.getColor(i, j) == 1) {
button[i][j].setIcon(white);
} else if (b.getColor(i, j) == 2) {
button[i][j].setIcon(Black);
}
}
}
beginGame.setVisible(true);
}
if (e.getActionCommand().equals("Place")) {
// u press on the button to manually place a piece
for(int i=0; i< this.r1; i++){
for (int j = 0; j < cc; j++) {
if(e.getSource() == button[i][j]){
b.put(i, j);
if (b.getColor(i, j) == 0) {
button[i][j].setText("");
button[i][j].setIcon(red);
if (checkBoard()) {
beginGame.setVisible(true);
}
break;
} else {
if (b.getColor(i, j) == 1) {
button[i][j].setText("");
button[i][j].setIcon(white);
if (checkBoard()) {
beginGame.setVisible(true);
}
break;
} else {
button[i][j].setText("");
button[i][j].setIcon(Black);
if (checkBoard()) {
beginGame.setVisible(true);
}
break;
}
}
}
}
}
}
if (e.getSource() == clear) {
for (int i = 0; i <= r1 - 1; i++) {
for (int j = 0; j <= cc - 1; j++) {
button[i][j].setIcon(null);
if (button[i][j].getText().equals("")) {
button[i][j].setText("Place");
}
}
}
}
if (e.getSource() == beginGame) { //begins the move part
b.currentPhase = 2;
panelFill.setVisible(false);
remove(panelFill);
}
}
public void mouseClicked(MouseEvent e) { //move mouselistener
if (b.getCurrentPhase() == 2) {
if (clickedButton == null) {
clickedButton = button[e.getX()][e.getY()];
}
else {
// second button, so do the 'move'
int x1 = clickedButton.getX();
int y1 = clickedButton.getY();
int x2 = e.getX();
int y2 = e.getY();
b.move(x1, y1, x2, y2);
if (button[x1][y1].getIcon() == red) {
button[x2][y2].setIcon(red);
button[x1][y1].setIcon(null);
}
if (button[x1][y1].getIcon() == white) {
button[x2][y2].setIcon(white);
button[x1][y1].setIcon(null);
}if (button[x1][y1].getIcon() == Black) {
button[x2][y2].setIcon(Black);
button[x1][y1].setIcon(null);
}
// clear the clickedButton so that we know the next click is a first click
clickedButton = null;
}
}
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：1)
你应该有一个全局变量，它保存对单击的第一个按钮的引用，然后在单击第二个按钮时使用它。例如......
JButton clickedButton = null;
public void mouseClicked(MouseEvent e){
if (clickedButton == null){
// first button clicked - so remember the button
clickedButton = (JButton)e.getSource();
}
else {
// second button, so do the 'move'
JButton secondButton = (JButton)e.getSource();
doMove(clickedButton,secondButton);
// clear the clickedButton so that we know the next click is a first click
clickedButton = null;
}
}
在此代码中，我们有一个JButton全局变量。当此变量为null时，我们知道用户尚未点击任何内容。当变量有值时，我们知道用户已经点击了第一个按钮，这是该变量的值。
因此，当触发mouseClicked()事件并且clickedButton变量有值时，我们知道move clickedButton到刚刚点击的按钮（第二个按钮）。
请注意，我们正在将e.getSource()投射到JButton，而不先检查它实际上是JButton。我没有在上面的代码中包含这个，因为它会使它复杂化，但你应该在做这些演员之前先检查一下，就像这样......
Object sourceObject = e.getSource();
if (sourceObject instanceof JButton){
JButton button = (JButton)sourceObject;
// other processing code
}
如果在不是JButton的对象上触发事件，这将防止它失败。
我希望这有道理 - 让我知道你是否需要更好的解释。
答案 1 :(得分：1)
将Swing Action或ActionListener添加到JButton以致anotherButton.doClick()