Java 按钮背景不改变
我正在尝试制作一个reversi GUI,并尝试使用if循环更改按钮的颜色。但是,当它在该代码上运行时,不会更改颜色:Java 按钮背景不改变,java,swing,colors,background,jbutton,Java,Swing,Colors,Background,Jbutton,我正在尝试制作一个reversi GUI,并尝试使用if循环更改按钮的颜色。但是,当它在该代码上运行时,不会更改颜色: if(y.board[i][j - 1] == 2) { y.board[i][j] = 1; butArray[i][j].setBackground(Color.yellow); y.board[i][j - 1] = 1; butArray[i][j - 1].setBackground(Color.yellow); System.
if(y.board[i][j - 1] == 2)
{
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i][j - 1] = 1;
butArray[i][j - 1].setBackground(Color.yellow);
System.out.println("4");
}
这是我的JButton
声明部件
for(l=0; l < butArray.length; l++)
{
for(y=0; y <butArray[l].length; y++)
{
butArray[l][y] = new JButton("Xg");
butArray[l][y].addActionListener(this);
butArray[l][y].setBackground(Color.white);;
butArray[l][y].setOpaque(true);
buttons.add(butArray[l][y]);
}
}
for(l=0;l 对于(y=0;y我不知道您打算在执行流的哪个部分更改按钮的背景色,但乍一看,您的代码看起来是正确的..因为方法setBackground color完全按照它的说明执行
您是试图在组件的任何类型的侦听器的回调中设置背景(使用事件分派线程)还是在另一个线程中设置
还要确保componentisOpaque
属性设置为true。(设置为public voidset不透明(布尔isOpaque)
mutator方法)。有时这可能是问题所在
希望有帮助!您正在创建多个Reversi
,Reversi x=new Reversi()
,这意味着当您检查游戏状态时,它始终处于默认状态
您似乎对控制台(线性)和基于GUI(事件驱动)的程序的工作方式的不同感到困惑
首先创建Reversi
的单个实例作为类的实例字段。当发生某些状态更改事件时,使用此实例确定UI或模型应如何更新可能我缺少一些明显的内容,但我不知道顶层代码块应该做什么,它位于何处,或者如何更新这与你的问题有关。考虑张贴更多的信息和相关的代码,但是在这样做之前,从我们的角度考虑你的问题:没有线索的人,你的程序看起来什么样。只是添加了完整的代码,谢谢你的帮助。是的,我试图改变按钮的颜色,点击它时,它符合标准。所有按钮在开始时都设置为不透明。您的意思是像用户在第二个代码段中使用“butArray[l][y].setOpaque(true)”来初始化按钮一样?
/*
* Jesse Richards
* CMSC 112
*/
import java.awt.Color;
import java.util.Scanner;
public class Reversi {
int playerturn;
int counter;
int[][] board = new int[8][8];
Scanner keyboard = new Scanner(System.in);
int playerOnePoints;
int playerTwoPoints;
//getting things set
public void setplayerturn(){
int i;
if (counter % 2 == 0){
playerturn = 1;
}
else{
playerturn = 2;
}
}
//setting arrays
public void setArrays(){
int i;
int j;
for(i = 0;i<8;i++){
for(j = 0;j<8;j++){
board[i][j] = 0;
}
}
}
//gets what player is going
public void printBoard(){
int i,j;
for(i = 0;i<8;i++){
for(j = 0;j<8;j++){
System.out.print(board[i][j]);
System.out.print(" ");
}
System.out.println("");
}
}
public void points(){
int i,j;
for(i = 0;i<8;i++){
for(j = 0;j<8;j++){
if(board[i][j] == 1){
playerOnePoints++;
}
else{
playerTwoPoints++;
}
}
}
}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.Color;
public class ReversiDriver extends JFrame implements ActionListener {
private JPanel score;
private JPanel buttons;
JButton[][] butArray = new JButton[8][8];
public static void main(String[] args) {
ReversiDriver gui = new ReversiDriver();
gui.setVisible(true);
// TODO Auto-generated method stub
Reversi x = new Reversi();
int i;
x.setplayerturn();
x.setArrays();
// for(i = 0;i<64;i++){
//
//
// x.printBoard();
//
// x.counter++;
//
//
// System.out.println("");
// }
x.points();
System.out.println("Player one has " + x.playerOnePoints +" Points");
System.out.println("Player two has " + x.playerTwoPoints +" Points");
if(x.playerOnePoints>x.playerTwoPoints){
System.out.println("Player One Wins!");
} else {
System.out.println("Player Two Wins!");
}
}
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("BUG");
//importing methods
Reversi x = new Reversi();
int i;
int j;
int l,y;
// TODO Auto-generated method stub
//if-else
//e.getSource() --> return the name of button
for(l=0; l < butArray.length; l++){
for(y=0; y <butArray[l].length; y++){
if(e.getSource() == butArray[l][y]){
//button was clicked1
playerOneTurn(l,y);
}
}
}
//e.getactionCommand()
String but = e.getActionCommand();
}
public boolean playerOneTurn(int i, int j){
int x;
Reversi y = new Reversi();
y.board[3][3] = 1;
y.board[3][4] = 2;
y.board[4][3] = 2;
y.board[4][4] = 1;
if(y.board[i - 1][j] == 0){
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i -1][j] = 1;
butArray[i - 1][j].setBackground(Color.yellow);
System.out.println("1");
}
if(y.board[i + 1][j] == 2){
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i + 1][j] = 1;
butArray[i + 1][j].setBackground(Color.yellow);
System.out.println("2");
}
if(y.board[i][j + 1] == 2){
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i][j + 1] = 1;
butArray[i][j + 1].setBackground(Color.yellow);
System.out.println("3");
}
if(y.board[i][j - 1] == 2){
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i][j - 1] = 1;
butArray[i][j - 1].setBackground(Color.yellow);
System.out.println("4");
}
if(y.board[i][j - 1] == 2){
y.board[i][j] = 1;
butArray[i][j].setBackground(Color.yellow);
y.board[i][j - 1] = 1;
butArray[i][j - 1].setBackground(Color.yellow);
System.out.println("5");
}
System.out.println("JEse");
return false;
}
public ReversiDriver(){
super("Menu Demonstration");
setSize(400, 600);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new GridLayout(2, 2));
score = new JPanel();
score.setBackground(Color.black);
add(score,BorderLayout.SOUTH);
buttons = new JPanel();
add(buttons, BorderLayout.NORTH);
int y;
int l;
//arrange buttons
for(l=0; l < butArray.length; l++){
for(y=0; y <butArray[l].length; y++){
butArray[l][y] = new JButton("Xg");
butArray[l][y].addActionListener(this);
butArray[l][y].setBackground(Color.white);;
butArray[l][y].setOpaque(true);
buttons.add(butArray[l][y]);
}
}
//set four start buttons
butArray[3][3].setBackground(Color.yellow);
butArray[3][4].setBackground(Color.blue);
butArray[4][3].setBackground(Color.blue);
butArray[4][4].setBackground(Color.yellow);
}
}