如何在Java数组中设置JButton的颜色? [英] How to set the color of JButtons in an array in java?
问题描述
假设有一个名称按钮数组:
私有JButton按钮[] =新的JButton [9];
如何将数组中所有按钮的颜色设置为蓝色?
Suppose there is an array of the name buttons:
private JButton buttons[] = new JButton[9];
How can I set the color of all the buttons in this array to blue?
这是我的全部代码:这是使用按钮的Tic Tac Toe游戏.
This is my entire code: It is a game of Tic Tac Toe with the use of buttons.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.BorderLayout;
public class TicTacToe implements ActionListener {
private JButton buttons[] = new JButton[9];
private JFrame window = new JFrame("Tic Tac Toe");
private boolean win = false;
private int count = 0;
private int Xwins = 0, Owins = 0;
private String letter = "";
private int[][] winCombinations = new int[][] {
{0, 1, 2}, {3, 4, 5}, {6, 7, 8}, //horizontal wins
{0, 3, 6}, {1, 4, 7}, {2, 5, 8}, //vertical wins
{0, 4, 8}, {2, 4, 6} //diagonal wins
};
String name1 = JOptionPane.showInputDialog("Please enter first player's name");
String name2 = JOptionPane.showInputDialog("Please enter second player's name");
public TicTacToe(){
JOptionPane.showMessageDialog(null,"Remember Player 1 is X and Player 2 is O.");
window.setSize(300,300);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.setLayout(new GridLayout(3,3));
window.setVisible(true);
for(int i=0; i<=8; i++){
buttons[i] = new JButton();
window.add(buttons[i]);
buttons[i].addActionListener(this);
buttons[i].setBackground(Color.MAGENTA);
}
for (JButton button: buttons) {
button.setBackground(Color.BLUE);
}
}
public void actionPerformed(ActionEvent event) {
count++;
if(count % 2 == 0){
letter = "O";
}else{
letter = "X";
}
JButton pressedButton = (JButton)event.getSource();
pressedButton.setText(letter);
pressedButton.setEnabled(false);
pressedButton.setBackground(Color.WHITE);
//Determine who won
for(int i=0; i<=7; i++){
if( buttons[winCombinations[i][0]].getText().equals(buttons[winCombinations[i][1]].getText()) &&
buttons[winCombinations[i][1]].getText().equals(buttons[winCombinations[i][2]].getText()) &&
buttons[winCombinations[i][0]].getText() != ""){
win = true;
}
}
if(win == true){
if(letter == "X"){
JOptionPane.showMessageDialog(null, name1 + " wins the game!");
}else{
JOptionPane.showMessageDialog(null, name2 + " wins the game!");
}
playAgain();
}else if(count == 9 && win == false){
JOptionPane.showMessageDialog(null, "The game is tied!");
playAgain();
}
}
public void playAgain(){
if(letter == "X"){
Xwins++;
}else{
Owins++;
}
JOptionPane.showMessageDialog(null, name1 + " has won this many times: " + Xwins);
JOptionPane.showMessageDialog(null, name2 + " has won this many times: " + Owins);
int response = JOptionPane.showConfirmDialog(null, "Would you like to play again?", "Confirm", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
if(response == JOptionPane.YES_OPTION){
reset();
}else{
System.exit(0);
}
}
public void reset() {
for(int i = 0; i<=8; i++) {
buttons[i].setText("");
buttons[i].setEnabled(true);
}
win = false;
count = 0;
}
public static void main(String[] args){
TicTacToe play = new TicTacToe();
}
}
推荐答案
您需要在reset
方法的for
循环中将按钮颜色重置为蓝色:
You need to reset the button color to blue in the reset
method's for
loop:
buttons[i].setBackground(Color.blue);
这是在我的机器和Mac OSX机器上生成的应用程序的外观.选择后,按钮变为白色:
Here's what the resulting application looks like on my machine and a Mac OSX machine. The buttons change to white after being selected:
如果您使用的是Mac OSX,则您的系统Look&感觉.您可以像这样在main
方法中更改它:
If you're on Mac OSX, you may also be having problems with the system Look & Feel. You can change this in your main
method like this:
public static void main(String[] args){
try {
// Set cross-platform Java L&F (also called "Metal")
UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
// alternatively, the following should load the default L&F for your system
//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {}
TicTacToe play = new TicTacToe();
}
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