私はJavaにかなり慣れていないので、迷路に変えたい次のテキストファイルがあります。
*************************************************
*************************************************
*************************************************
************************S************************
******************* *F ******************
**************** * * ******* ***************
************** * * *** *************
************* * ** ***********
************ * ** * ** **********
********** * * *** ** *********
********** ** ** * *******
*************** ** ** ***** ******
***************** ** ** ******* ******
****************** * * ********* *****
******* ************ * ************ *****
****** ********** * * ********** ****
****** ** ******** * * ******** ****
***** *** ******* * ****** * *** ***
***** ** * ****** * ****** * *** ***
**** ** * ******** * ******** * ** ***
**** ** * ** ******* ******* ** * * ** **
**** ** * *** ** ****** ****** ** * * **
**** ** * * ********** ********** *** *** **
**** *** **** ********* * ********* ** *** **
**** **** *** ******* ******* ** **** **
**** ***** *** ****** ***** * ***** **
**** **** * * ** *** ***** **
**** ** ** ** * * * * * ***** * **
**** ******* * * ********* * * ** **** **
**** ***** ***** * * * *** *** ****** *** **
**** ** ** ******* *** * ******* **** * ***
***** ***** * * ********* ***** ** * ****** ***
***** ** *** * * ********** * * * ** ***
****** ** * ** * * * ** * * *** ** ****
****** *** *** * * ** ** *** *** ****
****** ** * ***** * * * **** ** *****
******* *** * ** **** * **** ** *** ******
******** **** * * ********** * *** *******
********* **** * * * * *** *********
********** ***** * * ****** *********
*********** * ***** ** ** ********** *********
************ ** ************** ** ***********
**************** * ** ************
**************** ******* **** **************
****************** ****** **** ****************
*************************************************
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問題は、ファイルをアップロードしようとするたびに（202行目から）「ファイルエラー」メッセージが表示され続けることです。これが私のメインプログラムです：
/*
* MazeRunner.java
*
*/
package mazerunner;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import javax.swing.Timer;
import javax.swing.JFileChooser;
import javax.swing.JPanel;
public class MazeRunner extends javax.swing.JFrame {
public static final int wall = 0;
public static final int open = 1;
public static final int visited = 2;
public static final int onpath = 3;
public static final int start = 4;
public static final int end = 5;
public static final int pending = 6;
public static final int mazeSize = 50;
public static Color[] colors = {Color.BLACK, Color.WHITE, Color.MAGENTA, Color.ORANGE,
Color.CYAN, Color.RED, Color.LIGHT_GRAY};
JFileChooser fileChooser = new JFileChooser();
public int maze[][] = new int[mazeSize][mazeSize];
public Timer clock = new Timer(100, new ActionListener() {
public void actionPerformed(ActionEvent e) {
tick();
mazePanel.repaint();
}
});
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MazeRunner().setVisible(true);
}
});
}
public class MyPanel extends JPanel {
@Override
public void paint(Graphics g) {
super.paint(g);
for (int i = 0; i < mazeSize; i++) {
for (int j = 0; j < mazeSize; j++) {
g.setColor(colors[maze[i][j]]);
g.fillRect(i, j, 12, 12);
}
}
}
}
public MazeRunner() {
initComponents();
clock.start();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
mazePanel = new MyPanel();
loadMaze = new javax.swing.JButton();
collectionSelection = new javax.swing.JComboBox();
title = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
mazePanel.setBackground(new java.awt.Color(204, 255, 204));
mazePanel.setPreferredSize(new java.awt.Dimension(600, 600));
org.jdesktop.layout.GroupLayout mazePanelLayout = new org.jdesktop.layout.GroupLayout(mazePanel);
mazePanel.setLayout(mazePanelLayout);
mazePanelLayout.setHorizontalGroup(
mazePanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 600, Short.MAX_VALUE)
);
mazePanelLayout.setVerticalGroup(
mazePanelLayout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(0, 600, Short.MAX_VALUE)
);
loadMaze.setText("Load File");
loadMaze.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
loadMazeActionPerformed(evt);
}
});
collectionSelection.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Stack", "Queue" }));
title.setText("No File Loaded");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(mazePanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(layout.createSequentialGroup()
.add(54, 54, 54)
.add(title, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 351, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
.add(28, 28, 28)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(loadMaze, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.add(46, 46, 46))
.add(layout.createSequentialGroup()
.add(collectionSelection, 0, 111, Short.MAX_VALUE)
.addContainerGap())))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(loadMaze)
.add(81, 81, 81)
.add(collectionSelection, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(layout.createSequentialGroup()
.add(title, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 25, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.UNRELATED)
.add(mazePanel, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)))
.addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void loadMazeActionPerformed(java.awt.event.ActionEvent evt) {
int retval = fileChooser.showOpenDialog(this);
if (retval == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String s;
while ((s = reader.readLine()) != null) {
for (int i = 0; i < mazeSize; i++) {
for (int j = 0; j < mazeSize; j++) {
if (s.charAt(j) == '*') {
maze[i][j] = wall;
}
if (s.charAt(j) == ' ') {
maze[i][j] = open;
}
if (s.charAt(j) == 'F') {
maze[i][j] = end;
}
if (s.charAt(j) == 'S') {
maze[i][j] = start;
} else {
maze[i][j] = wall;
}
}
}
}
} catch (Exception e) {
title.setText("File Error");
}
}
}
// Variables declaration - do not modify
private javax.swing.JComboBox collectionSelection;
private javax.swing.JButton loadMaze;
private javax.swing.JPanel mazePanel;
private javax.swing.JLabel title;
// End of variables declaration
}
問題はこのコードセグメントにあると思いますが、どのようにそれをだましても、それを機能させることはできません。
private void loadMazeActionPerformed(java.awt.event.ActionEvent evt) {
int retval = fileChooser.showOpenDialog(this);
if (retval == JFileChooser.APPROVE_OPTION) {
File file = fileChooser.getSelectedFile();
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
String s;
while ((s = reader.readLine()) != null) {
for (int i = 0; i < mazeSize; i++) {
for (int j = 0; j < mazeSize; j++) {
if (s.charAt(j) == '*') {
maze[i][j] = wall;
}
if (s.charAt(j) == ' ') {
maze[i][j] = open;
}
if (s.charAt(j) == 'F') {
maze[i][j] = end;
}
if (s.charAt(j) == 'S') {
maze[i][j] = start;
} else {
maze[i][j] = wall;
}
}
}
}
} catch (Exception e) {
title.setText("File Error");
}
}
}
生成されたスタックトレースは次のとおりです。
java.lang.StringIndexOutOfBoundsException: String index out of range: 49
at java.lang.String.charAt(String.java:686)
at mazerunner.MazeRunner.loadMazeActionPerformed(MazeRunner.java:172)
at mazerunner.MazeRunner.access$100(MazeRunner.java:19)
at mazerunner.MazeRunner$3.actionPerformed(MazeRunner.java:111)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6382)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3275)
at java.awt.Component.processEvent(Component.java:6147)
at java.awt.Container.processEvent(Container.java:2083)
at java.awt.Component.dispatchEventImpl(Component.java:4744)
at java.awt.Container.dispatchEventImpl(Container.java:2141)
at java.awt.Component.dispatchEvent(Component.java:4572)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4619)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4280)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4210)
at java.awt.Container.dispatchEventImpl(Container.java:2127)
at java.awt.Window.dispatchEventImpl(Window.java:2489)
at java.awt.Component.dispatchEvent(Component.java:4572)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:704)
at java.awt.EventQueue.access$400(EventQueue.java:82)
at java.awt.EventQueue$2.run(EventQueue.java:663)
at java.awt.EventQueue$2.run(EventQueue.java:661)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:677)
at java.awt.EventQueue$3.run(EventQueue.java:675)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:674)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
誰かが私を正しい方向に向けることができれば、それは大いにありがたいです！