我正在使用Swing GUI表单开始编程我的最终项目。这就是导致我出现问题的原因
if (generated.get(round) == 1)
它的数字并不重要，任何类似的语句都会给我IndexOutOfBoundsException。你们能帮忙吗？ （startButton位于中间）
round让我搞砸了，但我不知道为什么会搞乱电话
import java.util.ArrayList;
import java.util.Queue;
import java.util.Stack;
import javax.swing.JOptionPane;
public class finalProject extends javax.swing.JFrame {
/**
* Creates new form finalProject
*/
public finalProject() {
initComponents();
// declare colors in array
color [0] = "blue";
color [1] = "red";
color [2] = "green";
color [3] = "orange";
color [4] = "silver";
// make sure leaderboard is clear
leaderboardNum.clear();
leaderboardName.clear();
// no idea what this does
finalProject.this.setLocationRelativeTo(null);
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
故意在这里取出代码
}// </editor-fold>
private void resetButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// clear all queues and data except for colors
leaderboardNum.clear();
leaderboardName.clear();
generated.clear();
}
private void startButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// assume the person hasn't failed yet
failed = false;
// check if name entered
if (nameBox.getText().equals(""))
{
JOptionPane.showMessageDialog(null, "Put in a name or nickname", "Try again", JOptionPane.ERROR_MESSAGE);
}
else
{
// keep looping pattern until person fails
do
{
// begin generating random numbers for pattern
generated.add((int) (Math.random() * 5));
if (generated.get(round) == 0) // if the # is blue
{
// flash blue button or do something special
blueButton.setVisible(false);
// make loop to count time
for (int loop1 = 0; loop1 < 200; loop1++);
// bring blue button back
blueButton.setVisible(true);
// check if they click the blue button
if (blueButton.isSelected())
{
//correct goes up one
correct++;
}
else
{
// if they hit the wrong button, it resets the random & records score
generated.clear();
leaderboardName.add(nameBox.getText());
leaderboardNum.add(correct);
//show they failed
failed = true;
}
}
if (generated.get(round) == 1) // if the # is red
{
// flash blue button or do something special
redButton.setVisible(false);
// make loop to count time
for (int loop1 = 0; loop1 < 200; loop1++);
// bring blue button back
redButton.setVisible(true);
// check if they click the blue button
if (redButton.isSelected())
{
//correct goes up one
correct++;
}
else
{
// if they hit the wrong button, it resets the random & records score
generated.clear();
leaderboardName.add(nameBox.getText());
leaderboardNum.add(correct);
//show they failed
failed = true;
}
}
if (generated.get(round) == 2) // if the # is green
{
// flash blue button or do something special
greenButton.setVisible(false);
// make loop to count time
for (int loop1 = 0; loop1 < 200; loop1++);
// bring blue button back
greenButton.setVisible(true);
// check if they click the blue button
if (greenButton.isSelected())
{
//correct goes up one
correct++;
}
else
{
// if they hit the wrong button, it resets the random & records score
generated.clear();
leaderboardName.add(nameBox.getText());
leaderboardNum.add(correct);
//show they failed
failed = true;
}
}
if (generated.get(round) == 3) // if the # is orange
{
// flash blue button or do something special
orangeButton.setVisible(false);
// make loop to count time
for (int loop1 = 0; loop1 < 200; loop1++);
// bring blue button back
orangeButton.setVisible(true);
// check if they click the blue button
if (orangeButton.isSelected())
{
//correct goes up one
correct++;
}
else
{
// if they hit the wrong button, it resets the random & records score
generated.clear();
leaderboardName.add(nameBox.getText());
leaderboardNum.add(correct);
//show they failed
failed = true;
}
}
if (generated.get(round) == 4) // if the # is silver
{
// flash blue button or do something special
silverButton.setVisible(false);
// make loop to count time
for (int loop1 = 0; loop1 < 2000; loop1++);
// bring blue button back
silverButton.setVisible(true);
// check if they click the blue button
if (silverButton.isSelected())
{
//correct goes up one
correct++;
}
else
{
// if they hit the wrong button, it resets the random & records score
generated.clear();
leaderboardName.add(nameBox.getText());
leaderboardNum.add(correct);
//show they failed
failed = true;
}
}
// when game finishes, next round goes
round++;
} while (failed == false);
}
}
private void scoreButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// declare certain variables
boolean sorted;
int pass = 0, numTemp = 0;
String nameTemp;
// clear generated queue
generated.clear();
// hide all pictures and color buttons, show scores in scoreBox
// make sure the thing is cleared already
scoreBox.setText("");
//check if no scores
if (leaderboardNum.isEmpty())
{
scoreBox.setText("Go play the game and come back later!");
}
else
{
//bubble sort by score
do
{
// assume its sorted unless proven other wise
sorted = true;
// update pass
pass++;
// loop through score arraylist
for (int sortLoop = 0; sortLoop < leaderboardNum.size() - pass; sortLoop++)
{
if (leaderboardNum.get(sortLoop) < leaderboardNum.get(sortLoop + 1))
{
// switch scores
numTemp = leaderboardNum.remove(sortLoop);
leaderboardNum.set(sortLoop, leaderboardNum.remove(sortLoop + 1));
leaderboardNum.set(sortLoop + 1, numTemp);
// switch names
nameTemp = leaderboardName.remove(sortLoop);
leaderboardName.set(sortLoop, leaderboardName.remove(sortLoop + 1));
leaderboardName.set(sortLoop + 1, nameTemp);
// declare unsorted
sorted = false;
}
}
}
while (sorted == false);
}
}
private void quitButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// exit button
System.exit(WIDTH);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/*
* Set the Nimbus look and feel
*/
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(finalProject.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(finalProject.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(finalProject.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(finalProject.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new finalProject().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton blueButton;
private javax.swing.JLabel creatorLabel;
private javax.swing.JLabel creditsLabel;
private javax.swing.JTabbedPane gameSkeleton;
private javax.swing.JButton greenButton;
private javax.swing.JLabel instructionLabel;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JLabel leaderboardLabel;
private javax.swing.JPanel leaderboardPanel;
private javax.swing.JPanel mainGameBackground;
private javax.swing.JTextField nameBox;
private javax.swing.JLabel nameLabel;
private javax.swing.JButton orangeButton;
private javax.swing.JLabel pentagramPicture;
private javax.swing.JButton quitButton;
private javax.swing.JButton redButton;
private javax.swing.JButton resetButton;
private javax.swing.JTextArea scoreBox;
private javax.swing.JButton scoreButton;
private javax.swing.JButton showScoreButton;
private javax.swing.JButton silverButton;
private javax.swing.JButton startButton;
private javax.swing.JLabel thankYouLabel;
// End of variables declaration
// Declare leaderboard array list, will be sorted from high ==> low
ArrayList<Integer> leaderboardNum = new ArrayList<Integer>();
ArrayList<String> leaderboardName = new ArrayList<String>();
// give each color/spot on pentagram a # in an array, declared at top
String color [] = new String [5];
// random number that makes the color do the thing
ArrayList<Integer> generated = new ArrayList<Integer>();
// variable to see if player messed up
boolean failed;
// variable to see if player passed & to count the # of rounds
int correct = 0, round = 0;
}
这应该像西蒙说游戏一样。如果您可以推荐更有效的方法，那么我很乐意调查它！
答案 0 :(得分：1)
抛出array out of bounds exception表示已使用非法索引访问了数组。索引为负数或大于或等于数组的大小。
这来自if (generated.get(round) == 1)，因为之前您致电generated.clear(); removes all elements of your arraylist。这意味着您正在尝试访问阵列中不存在的索引。
答案 1 :(得分：0)
您已将round字段初始化为0.并且在do-while循环中，您首先将值添加到列表generated.add((int) (Math.random() * 5));并尝试获取generated.get(round)这应该可以正常运行。如果不是这种情况，您应该检查是否在其他地方修改了round。在获取之前尝试打印出圆形和列表大小的值。
然而，在基于某些条件的do-while循环中，您正在清除列表generated.clear();，并且在循环结束时递增。因此，在第二次迭代中，您可能尝试从大小为1的列表中获取索引1.请记住，索引从0开始，因此您实际上尝试从仅包含1个元素的列表中获取第2个元素。因此，当你执行generated.clear();时，你也应该重置为0。
答案 2 :(得分：-1)
IndexOutOfBoundsException /
假设我们有一个长度为5的数组;如果我们试图在4之后访问该元素，它将抛出该异常。