>后端程序使用扫描仪输入并仅打印出矩阵，但我在图形方面遇到了这个问题。当我只制作内部带有椭圆形的矩形时效果很好，但是当我在故事中引入 2D 数组以便我放下碎片的地方用其他颜色填充时会抛出"线程中的异常"AWT-EventQueue-0"java.lang.ArrayIndexOutOfBoundsException：6"。我尝试将其放在不同的地方并以其他顺序调用它，但它总是引发此异常
编辑：这只是一个原型代码，需要做更多的工作，但我需要处理这个错误才能继续。
全栈跟踪：
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 6
at GameLoop$DrawBoard.paintComponent(GameLoop.java:69)
at javax.swing.JComponent.paint(JComponent.java:1056)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paint(JComponent.java:1065)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:586)
at javax.swing.JComponent.paintChildren(JComponent.java:889)
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5217)
at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579)
at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502)
at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
at javax.swing.JComponent.paint(JComponent.java:1042)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:79)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:116)
at java.awt.Container.paint(Container.java:1975)
at java.awt.Window.paint(Window.java:3904)
at javax.swing.RepaintManager$4.run(RepaintManager.java:842)
at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
/**
* Author : Matija & Zvonimir
* Version : 1.0
* Purpose : Connect 4 game work. Creating working game with arrays
*
*
*/
import java.util.Arrays;
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.JComponent;
import java.awt.Graphics2D;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;
public class GameLoop extends JFrame{
// attributes
private int [][] matrix;
int col;
int row;
private boolean gameOver = false;
private int playerTurn = 0;
Scanner scan = new Scanner(System.in);
//constants
private static final int COL = 7;
private static final int ROWS = 6;
public static final int SQUARE_SIZE = 100;
public static final int WIDTH = COL * SQUARE_SIZE;
public static final int HEIGHT = (ROWS+1) * SQUARE_SIZE;
public static final int CIRCLE_WIDTH_HEIGHT = (SQUARE_SIZE) - 15;
//MAIN METHOD
public static void main(String []args){
GameLoop gl = new GameLoop();
//gl.gameOver();
}//main
/*GRAPHICS*/
private class DrawBoard extends JPanel{
int[][] board = new int[ROWS][COL];
public DrawBoard(){
for(int i = 0; i < ROWS; i++){
for(int j = 0; j < COL; j++){
board[i][j] = 0;
}
}//set to 0;
}
public void paintComponent(Graphics g){
super.paintComponents(g); //override
for(int i = 0; i < COL; i++){
for(int j = 0; j < ROWS; j++){
g.setColor(Color.BLUE);
g.fillRect( (i*SQUARE_SIZE),(j * SQUARE_SIZE+SQUARE_SIZE),SQUARE_SIZE,SQUARE_SIZE);
if(board[i][j] == 0){
g.setColor(Color.BLACK);
g.fillOval( (i*SQUARE_SIZE),(j*SQUARE_SIZE +SQUARE_SIZE),CIRCLE_WIDTH_HEIGHT,CIRCLE_WIDTH_HEIGHT);
}else if(board[i][j] == 1){
g.setColor(Color.RED);
g.fillRect( (i*SQUARE_SIZE),(j * SQUARE_SIZE+SQUARE_SIZE),SQUARE_SIZE,SQUARE_SIZE);
}else if(board[i][j] == 2){
g.setColor(Color.YELLOW);
g.fillOval( (i*SQUARE_SIZE),(j*SQUARE_SIZE +SQUARE_SIZE),CIRCLE_WIDTH_HEIGHT,CIRCLE_WIDTH_HEIGHT);
}
}
}
for(int i = 0; i < COL; i++){
for(int j = 0; j < ROWS; j++){
}//for J
} //for I
}//paint component method
}//CLASS
public GameLoop(){
DrawBoard board = new DrawBoard();
add(board);
setDefaultCloseOperation ( JFrame.EXIT_ON_CLOSE );
setPreferredSize( new Dimension(701,732));
//setResizable(false);
setLocation( 400,200 );
setVisible ( true );
pack();
}
/*
* Method that creates a 2d array (matrix) filled with 0s
* @param matrix 2d array
*/
public int[][] createBoard(){
matrix = new int[ROWS][COL];
for(int i = 0; i < ROWS; i++){
for(int j = 0; j < COL; j++){
matrix[i][j] = 0;
}
}//set to 0
return matrix;
}//create board
}//class game loop
索引板时混合了行和列[]
for(int i = 0; i < COL; i++){
for(int j = 0; j < ROWS; j++){
g.setColor(Color.BLUE);
g.fillRect( (i*SQUARE_SIZE),(j * SQUARE_SIZE+SQUARE_SIZE),SQUARE_SIZE,SQUARE_SIZE);
if(board[i][j] == 0){
g.setColor(Color.BLACK);
g.fillOval( (i*SQUARE_SIZE),(j*SQUARE_SIZE +SQUARE_SIZE),CIRCLE_WIDTH_HEIGHT,CIRCLE_WIDTH_HEIGHT);
}else if(board[i][j] == 1){
g.setColor(Color.RED);
g.fillRect( (i*SQUARE_SIZE),(j * SQUARE_SIZE+SQUARE_SIZE),SQUARE_SIZE,SQUARE_SIZE);
}else if(board[i][j] == 2){
g.setColor(Color.YELLOW);
g.fillOval( (i*SQUARE_SIZE),(j*SQUARE_SIZE +SQUARE_SIZE),CIRCLE_WIDTH_HEIGHT,CIRCLE_WIDTH_HEIGHT);
}
}
}
它应该是 board[j][i]，或者只是在循环语句中交换它们的角色