HERE IS THE JAVA CODE.HAVING ARRAY INDEX OUT OF BOUND ERROR ON RUNTIME. i don't know what to do. I have tried every possible solution for this. This is the error i am getting "Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1 at QuizPG1.(QuizPG1.java:90) at QuizPG1$3.run(QuizPG1.java:330)"
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.ButtonGroup;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.table.DefaultTableModel;
public class QuizPG1 extends javax.swing.JFrame {
String questions[][]=new String [10][5];
String answers [][]=new String [10][1];
String userans[][]=new String[10][1];
public static int timer = 15;
public static int answerGiven = 0;
public static int count = 0;
public static int score = 0;
String name;
public QuizPG1(String name) {
this.name = name;
initComponents();
setSize(950,750);
setLocation(500,150);
questions[0][0]="What is the general purpose of JAVA VIRTUAL MACHINE(JVM)?";
questions[0][1]="Compile Java Code";
questions[0][2]="Execute Java Code"; //correct
questions[0][3]="Debug Java Code";
questions[0][4]="Package Java Code";
questions[1][0]="Which keyword is used to define constant variable in JAVA?";
questions[1][1]="final"; //correct
questions[1][2]="const";
questions[1][3]="var";
questions[1][4]="static";
questions[2][0]="In JAVA which access modifier provides the widest visibility?";
questions[2][1]="private";
questions[2][2]="default";
questions[2][3]="protected";
questions[2][4]="public"; //correct
questions[3][0]="Which is the correct syntax to create an object of a class named 'My Class'?";
questions[3][1]="object MyClass = new object;";
questions[3][2]="MyClass obj = create MyClass();";
questions[3][3]="MyClass obj = new MyClass();"; //correct
questions[3][4]="object obj = new MyClass;";
questions[4][0]="Which data type is used to store a single Unicode character in JAVA?";
questions[4][1]="char"; //correct
questions[4][2]="string";
questions[4][3]="character";
questions[4][4]="unicode";
questions[5][0]="Which statement is used to exit a loop in JAVA?";
questions[5][1]="halt";
questions[5][2]="stop";
questions[5][3]="end";
questions[5][4]="break"; //correct
questions[6][0]="Which of the following is not a primitive data type in JAVA?";
questions[6][1]="int";
questions[6][2]="float";
questions[6][3]="boolean";
questions[6][4]="object"; //correct
questions[7][0]="Which JAVA loop is guaranteed to execute at least once?";
questions[7][1]="while";
questions[7][2]="do-while"; //correct
questions[7][3]="for";
questions[7][4]="for-each";
questions[8][0]="Which method is called automatically when an object is created from a class?";
questions[8][1]="start()";
questions[8][2]="initialize()";
questions[8][3]="main()";
questions[8][4]="constructor()"; //correct
questions[9][0]="Which JAVA keyword is used to explicitly raise an exception?";
questions[9][1]="raise";
questions[9][2]="throw"; //correct
questions[9][3]="exception";
questions[9][4]="try";
answers[0][1]="Execute Java Code";
answers[1][1]="final";
answers[2][1]="public";
answers[3][1]="MyClass obj = new MyClass();";
answers[4][1]="char";
answers[5][1]="break";
answers[6][1]="object";
answers[7][1]="do-while";
answers[8][1]="constructor()";
answers[9][1]="throw";
buttonGroup1.add(opt1);
buttonGroup1.add(opt2);
buttonGroup1.add(opt3);
buttonGroup1.add(opt4);
submit.setEnabled(false);
add(submit);
start(count);
setVisible(true);
}
QuizPG1() {
throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
private void nextActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// DefaultTableModel tb = (DefaultTableModel) tablemodel1.getModel();
repaint();
answerGiven = 1;
if (buttonGroup1.getSelection()== null){
userans[count][0]="";
}else{
userans[count][0]=buttonGroup1.getSelection().getActionCommand();
}
if(count == 8){
next.setEnabled(false);
submit.setEnabled(true);
}
count++;
start(count);
}
private void submitActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
answerGiven = 1;
if (buttonGroup1.getSelection()==null){
userans[count][0]="";
}else{
userans[count][0]=buttonGroup1.getSelection().getActionCommand();
}
for(int i=0 ; i<userans.length;i++){
if(userans[i][0].equals(answers[i][1])){
score += 10;
}
}
setVisible(false);
new Score(name,score);
//SCOREtf.setText(score);
}
/**
* @param args the command line arguments
*/
public void paint(Graphics g){
super.paint(g);
String time = "Time Left:"+ timer + "seconds";
g.setColor(Color.RED);
g.setFont(new Font("Tahoma",Font.BOLD,25));
if (timer > 0){
g.drawString(time, 900, 500);
}else{
g.drawString("Times Up!!", 900, 500);
}
timer--;
try{
Thread.sleep(1000);
repaint();
} catch (InterruptedException ex) {
Logger.getLogger(QuizPG1.class.getName()).log(Level.SEVERE, null, ex);
}
if (answerGiven == 1){
answerGiven = 0;
timer = 15;
}else if (timer < 0) {
if(count == 8){
next.setEnabled(false);
submit.setEnabled(true);
}
if(count == 9){ //submit button
if(count < userans.length){
if (buttonGroup1.getSelection()==null){
userans[count][0]="";
}else{
userans[count][0]=buttonGroup1.getSelection().getActionCommand();
}
}
for(int i=0 ; i<userans.length;i++){
if(userans[i][0]!= null && userans[i][0].equals(answers[i][1])){
score += 10;
}
}
setVisible(false);
new Score(name,score);
} else{ // next button
if (buttonGroup1.getSelection()==null){
userans[count][0]="";
}else{
userans[count][0]=buttonGroup1.getSelection().getActionCommand();
}
count++;
start(count);
}
}
}
public void start(int count){
qno.setText(""+ (count +1)+".");
question.setText(questions[count][0]);
opt1.setText(questions[count][1]);
opt1.setActionCommand(questions[count][1]);
opt2.setText(questions[count][2]);
opt2.setActionCommand(questions[count][2]);
opt3.setText(questions[count][3]);
opt3.setActionCommand(questions[count][3]);
opt4.setText(questions[count][4]);
opt4.setActionCommand(questions[count][4]);
buttonGroup1.clearSelection();
}
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(QuizPG1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(QuizPG1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(QuizPG1.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(QuizPG1.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 QuizPG1("user").setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.ButtonGroup buttonGroup1;
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
private javax.swing.JButton next;
private javax.swing.JRadioButton opt1;
private javax.swing.JRadioButton opt2;
private javax.swing.JRadioButton opt3;
private javax.swing.JRadioButton opt4;
private javax.swing.JLabel qno;
private javax.swing.JLabel question;
private javax.swing.JButton submit;
// End of variables declaration
}
I tried this piece of code in paint method.
for(int i = 0; i < userans.length; i++){
if(userans[i][0] != null && userans[i][0].equals(answers[i][1])){
score += 10;
}
}```
But it is still giving error.So i removed that amendment from my original code. Please provide me the solution.
The program is simple but on runtime I am having the Array index out of bound error.
