java - 我有一个 ArrayIndexOutOfBoundsException 错误

Question

我的代码中有这个错误：

线程“main”中的异常 java.lang.ArrayIndexOutOfBoundsException: 70
在 Main.main(Main.java:72)

我不知道它为什么这样做？请帮忙。我提前谢谢你。我在几个网站上浏览了几个线程，但没有任何效果。我已经为此工作了一段时间。我知道 ArrayIndexOutOfBoundsException 是什么，但我试图弄清楚但我没有成功

这是代码：

import java.util.Scanner;

import java.util.Random;
public class Main
{
    public static void main (String[] args)
    {
        Scanner myScanner = new Scanner (System.in);
        Random myRandom = new Random();
        int answer;
        int definitionSelected = 0;
        String[] code = new String[68];
        String[] definition = new String[68];
        int[] listedDefinition = new int[4];
        int[] definitionUsed = new int[68];
        int i;
        int Size = 68;
        int Other = 4;
        double[] alpha = new double[68];
        int count = 0;
        code[0] = "10-0" ; definition[0] = "Disappeared";
        code[1] = "10-1" ; definition[1] = "Frequency Change";
        code[2] = "10-2" ; definition[2] = "Negative";
        code[3] = "10-3" ; definition[3] = "Stop Transmitting";
        code[4] = "10-4" ; definition[4] = "Affirmative";
        code[5] = "10-5" ; definition[5] = "Relay Message";
        code[6] = "10-6" ; definition[6] = "Busy";
        code[7] = "10-7" ; definition[7] = "Out Of Service";
        code[8] = "10-8" ; definition[8] = "In Service";
        code[9] = "10-9" ; definition[9] = "Repeat";
        code[10] = "10-10" ; definition[10] = "Fight In Progress";
        code[11] = "10-11" ; definition[11] = "Traffic Stop";
        code[12] = "10-12" ; definition[12] = "Standby";
        code[13] = "10-13" ; definition[13] = "Gun Shots";
        code[15] = "10-15" ; definition[15] = "Subject en Route to station";
        code[16] = "10-16" ; definition[16] = "Stolen Vehicle";
        code[17] = "10-17" ; definition[17] = "Suspicious Person";
        code[19] = "10-19" ; definition[19] = "Active Ride Along";
        code[20] = "10-20" ; definition[20] = "location";
        code[22] = "10-22" ; definition[22] = "Disregard";
        code[23] = "10-23" ; definition[23] = "Arrived on scene";
        code[25] = "10-25" ; definition[25] = "Do you have contact with ?";
        code[26] = "10-26" ; definition[26] = "ETA";
        code[27] = "10-27" ; definition[27] = "Drivers license check for valid";
        code[28] = "10-28" ; definition[28] = "license Plate check";
        code[29] = "10-29" ; definition[29] = "NCIC Warrant Check";
        code[30] = "10-30" ; definition[30] = "Wanted Person";
        code[31] = "10-31" ; definition[31] = "Armed Suspect";
        code[32] = "10-32" ; definition[32] = "Request Backup, Code 1,2,3";
        code[34] = "10-34" ; definition[34] = "Wanted Person";
        code[35] = "10-35" ; definition[35] = "Not Wanted No Warrants";
        code[38] = "10-38" ; definition[38] = "Suspicious Vehicle";
        code[41] = "10-41" ; definition[41] = "Beginning Tour Of Duty";
        code[42] = "10-42" ; definition[42] = "Ending Tour Of Duty";
        code[43] = "10-43" ; definition[43] = "Information About ?";
        code[46] = "10-46" ; definition[46] = "Attempt Of Suicide";
        code[49] = "10-49" ; definition[49] = "Drag Racing";
        code[50] = "10-50" ; definition[50] = "vehicle Accident";
        code[51] = "10-51" ; definition[51] = "Request Towing Service";
        code[52] = "10-52" ; definition[52] = "Request EMS";
        code[53] = "10-53" ; definition[53] = "Request Fire Department";
        code[54] = "10-54" ; definition[54] = "Hit And Run";
        code[55] = "10-55" ; definition[55] = "Intoxicated Driver";
        code[56] = "10-56" ; definition[56] = "Intoxicated Pedestrian";
        code[60] = "10-60" ; definition[60] = "Assault By An Animal";
        code[61] = "10-61" ; definition[61] = "Bicycle Theft";
        code[62] = "10-62" ; definition[62] = "Kidnapping";
        code[63] = "10-63" ; definition[63] = "Radio Check";
        code[64] = "10-64" ; definition[64] = "Sexual Assualt";
        code[65] = "10-65" ; definition[65] = "Armed Robbery";
        code[66] = "10-66" ; definition[66] = "Reckless Driver";
        code[67] = "10-67" ; definition[67] = "Fire";
        code[70] = "10-70" ; definition[70] = "Foot Pursuit";
        code[71] = "10-71" ; definition[71] = "Request Supervisor On Scene";
        code[72] = "10-72" ; definition[72] = "Administrative Assistance";
        code[73] = "10-73" ; definition[73] = "Advise Status";
        code[74] = "10-74" ; definition[74] = "Negative";
        code[76] = "10-76" ; definition[76] = "Prowler";
        code[80] = "10-80" ; definition[80] = "Vehicle Pursuit";
        code[85] = "10-85" ; definition[85] = "Delay Due To";
        code[86] = "10-86" ; definition[86] = "Any Traffic For me?";
        code[88] = "10-88" ; definition[88] = " Requesting Deputy Chief (Department)";
        code[89] = "10-89" ; definition[89] = "Requesting Chief (Department)";
        code[90] = "10-90" ; definition[90] = "Warning";
        code[91] = "10-91" ; definition[91] = "Unnecessary use of Radio";
        code[93] = "10-93" ; definition[93] = "Bank Alarm";
        code[97] = "10-97" ; definition[97] = "In route";
        code[99] = "10-99" ; definition[99] = "Officer In Distress EXTREME EMERGENCY ONLY";
        do
        {
            answer = myRandom.nextInt(68);
            System.out.println("\nCode Is :  " + code [answer] + "\n");
            for (i = 0;i<Size;i++) {
                int j;
                do 
                {
                    j = myRandom.nextInt(68);
                }
                while (definitionUsed[j] != 0 || j == answer);
                definitionUsed[j] = 1;
                listedDefinition[i] = j;

            }
            listedDefinition[myRandom.nextInt(4)] = answer;
            for (i = 0;i<Other;i++)
            {
                System.out.println((i + 1) + " - " +
                definition[listedDefinition[i]]);
            }
            System.out.print("\nWhat is The definition? (Enter 0 to Stop) ");
            definitionSelected = myScanner.nextInt();
            if (definitionSelected != 0)
            {
                if (listedDefinition[definitionSelected - 1] == answer)
                System.out.println("That's It Good Job");

            }
            else
            {
                System.out.println("Sorry, The answer is " + definition +".");
            }
        }
        while (definitionSelected != 0);
        }
}

标签： javaarrays

Answer 1

您必须修复初始数组大小。

在您的代码中，您有：

code[99] = "10-99"

和

definition[99] = "Officer In Distress EXTREME EMERGENCY ONLY";

在这两种情况下，您都在尝试定位99，因此这意味着您至少有100元素（因为100元素的位置是 from 0to 99）。

因此，您必须在这些行中将初始大小从更改68为：100

String[] code = new String[68];
String[] definition = new String[68];
int[] listedDefinition = new int[4];
int[] definitionUsed = new int[68];
double[] alpha = new double[68];

至：

String[] code = new String[100];
String[] definition = new String[100];
int[] listedDefinition = new int[100];
int[] definitionUsed = new int[100];
double[] alpha = new double[100];