Question

我已经编写了这段代码并且编译得很好，但是当我尝试运行它时会给我一个错误，说字符串索引超出范围：11。有谁能告诉我我做错了什么？

import java.util。*; 课堂问题2 {

public static void main(String[] args)
{

    String[] section1 = {"Curie, Marie", "Feynman, Richard", "Germain, Sophie",
                         "Turing, Alan"};
    String[] section2 = {"Bolt, Usain", "Graf, Steffi","Hamm, Mia",};
    String[] section3 = {"Bach, Johann Sebastian", "Beethoven, Ludwig van", 
                         "Mozart, Wolfgang Amadeus", "Schumann, Clara"};
    String [] merged = mergeSortedArrays(section1,section2);

    //String[] merged =  mergeSortedArrays(mergeSortedArrays(section1, section2),section3);
    for (int z =0; z < merged.length-4; z++) {
     System.out.println(merged[z] + ", ");
    }


}

// Do not change the method header
public static String[] mergeSortedArrays(String[] a1, String[] a2) { //method for merging and ordering


    String[] temp  = new String[a1.length + a2.length]; // new array with size of the two input arrays
    int x; // variable declared for a for loop and other purposes
    for(x = 0; x< a1.length -1; x++){ //1st for loop to put in names from a1 to the new array 

      temp[x] = a1[x]; // code to store the strings from one array to the other 

    }

    for(int y = 0; y <a2.length -1; y++) {  //2nd for loop to put in names from a2 to the new array

     temp[x] = a2[y];         // code to store the strings from one array to the other
      x = x +1;              //increments x, to help incease the index of the new array
    }
    String[] tempor = new String[1]; 
    boolean finish = true; // boolean to help break the while loop used later

    while( finish == true) { // while loop to check the names to make them in order
       finish = false;       //makes the boolean false
     for(int i = 0; i < temp.length-1 ; i ++) {  // 3rd for loop. To check between two strings
        String temporary1 = temp[i];          // string variable that stores a string from the new array
        String temporary2 = temp[i+1];        // string variable that stores the next string from the same new array
        int minimum = Math.min(temporary1.length(), temporary2.length());
      for(int j = 0; j < minimum -1; j++) { //4th for loop. To check between characters of the two strings


       if((int)(temporary1.charAt(j)) == (int)(temporary2.charAt(j))) { //ascii value of same index characters of the two strings are compared. An int casting is done here. 
        //do nothing. If the two ascii values are same we iterate the for loop and compare the ascii values of the next two same index characters
        //move to next character
      }


       else{ //if two asciis are not same, we compare to see which one is bigger/smaller.


         if((int)temporary1.charAt(j) > (int)temporary2.charAt(j)) { //condition, if ascii of first char is greater, we swap the two strings
           tempor[0] = temp[i + 1]; 
           temp[i + 1] = temp[i];
           temp[i] = tempor[0];
           finish = true;
           j = j + 100;
         }

         else{
           j = j + 100;
           //do nothing
         }

       }


      }

     }

    }



  return temp;

} }

Answer 1

您正在访问第12个元素。看看下面

for(int i = 0; i < temp.length ; i ++) {
    String temporary1 =""+ temp[i];
    String temporary2 = ""+temp[i+1]; // when i is at last element you are accessing something after  that element which is invalid.
    // everything else

所以你必须将它循环到temp.length-1。在更多的地方也发生了同样的事情。试着纠正它。

字符串索引超出范围11错误java

1 个答案: