我是新來編碼,我一直在寫這段代碼,並試圖使其工作,但每次運行它崩潰。我已經查找了一些東西,並將編寫這段代碼,我已經遵循了java的網站,瞭解如何正確寫下代碼以及本網站。java.lang.ArrayIndexOutOfBoundsException:4錯誤
不管怎麼說,如果有人能向我解釋爲什麼這不起作用,因爲在我看來,邏輯在那裏,但我不明白它爲什麼會崩潰。
我的代碼:
import java.util.Scanner;
import java.lang.String;
import java.util.*;
public class Question1
{
public static void main(String[] args)
{
Scanner keyboard= new Scanner(System.in);
System.out.println("Enter either letters or numbers and I'll magically tell you if they are consecutive :D");
String inputedString= keyboard.nextLine();
boolean consecutiveOrNot=isConsecutive(inputedString);
System.out.println("Drum rolls...... Is it consecutive: "+ consecutiveOrNot); //Problem with this line?
}
public static boolean isConsecutive(String inputedString)
{
//Storing string's units into an array and converting to UpperCase if necessary
//and storing string's numerical value into the variable 'arrayCharToInt'
char[] charIntoArray= new char[inputedString.length()];
int[] arrayCharToInt= new int[inputedString.length()];
for (int i=0;i<inputedString.length();i++)
{
charIntoArray[i]=inputedString.charAt(i);
if (Character.isLetter(charIntoArray[i]) && Character.isLowerCase(charIntoArray[i]))
{
charIntoArray[i]= Character.toUpperCase(charIntoArray[i]);
}
arrayCharToInt[i]=(int) charIntoArray[i];
}
// The next if statements and the methods that they call are used to verify
//that the content of the initial string is either letters or numbers, but not both together
boolean[] continuous= new boolean[arrayCharToInt.length];
boolean[] testContNumbersDecreasing= new boolean[arrayCharToInt.length];
boolean[] testContNumbersIncreasing= new boolean[arrayCharToInt.length];
boolean[] testContLettersDecreasing= new boolean[arrayCharToInt.length];
boolean[] testContLettersIncreasing= new boolean[arrayCharToInt.length];
Arrays.fill(continuous, true);
if (lowestValue(arrayCharToInt)>=65 && highestValue(arrayCharToInt)<= 90)
{
for (int x=0;x<arrayCharToInt.length ;x++)
{
testContLettersIncreasing[x]=((arrayCharToInt[x+1]-arrayCharToInt[x]== 1) || (arrayCharToInt[x+1]-arrayCharToInt[x]== -25));
testContLettersDecreasing[x]=((arrayCharToInt[x]-arrayCharToInt[x+1]== 1) || (arrayCharToInt[x]-arrayCharToInt[x+1]== -25));
}
return (Arrays.equals(continuous,testContLettersIncreasing) || Arrays.equals(continuous,testContLettersDecreasing));
}
else if ((lowestValue(arrayCharToInt) >= 48) && (highestValue(arrayCharToInt)<= 57))
{
for (int x=0;x<arrayCharToInt.length ;x++)
{
testContNumbersIncreasing[x]=((arrayCharToInt[x+1]-arrayCharToInt[x]== 1) || (arrayCharToInt[x+1]-arrayCharToInt[x]== -9));
testContNumbersDecreasing[x]=((arrayCharToInt[x]-arrayCharToInt[x+1]== 1) || (arrayCharToInt[x]-arrayCharToInt[x+1]== -9));
}
return (Arrays.equals(continuous,testContNumbersIncreasing) || Arrays.equals(continuous,testContNumbersDecreasing));
}
else
{
return false;
}
}
public static int lowestValue(int[] array)
{
int lowest=array[0];
for (int counter=0; counter< array.length; counter++)
{
if(lowest>array[counter])
lowest= array[counter];
}
return lowest;
}
public static int highestValue(int[] array)
{
int highest=array[0];
for (int counter=0; counter< array.length; counter++)
{
if(highest<array[counter])
highest= array[counter];
}
return highest;
}
}
主要方法似乎是很好,因爲它把一切都在isConsecutive方法,除了評論「返回true;」而且程序確實運行並打印爲真。所以我知道問題在於第二種方法。
如果有什麼我沒有做的權利請告訴我,那將不勝感激。畢竟我還在學習。
感謝
的是有一個堆棧跟蹤? – Meistro