当两个矩阵具有相同的行数和列数时，代码工作正常。喜欢例如。3x3和3x3矩阵乘法工作正常。
当尝试将不同大小的矩阵相乘时，会出现以下错误。尝试将一个2x3矩阵和一个3x4矩阵相乘，结果出错。

**Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: Index 1 out of bounds for length 1
    at arrayprac.ArrayPrac.main(ArrayPrac.java:85)
38C:\Users\a807771\AppData\Local\NetBeans\Cache\17\executor-snippets\run.xml:111: The following error occurred while executing this line:
C:\Users\a807771\AppData\Local\NetBeans\Cache\17\executor-snippets\run.xml:68: Java returned: 1
BUILD FAILED (total time: 12 seconds)**

package arrayprac;
import java.util.Scanner;

public class ArrayPrac {
 
    public static void main(String[] args) {
        
     System.out.println("Enter number of rows for matrix 1: ");
     int row1,col1,row2,col2;
     Scanner sc=new Scanner(System.in);
     row1=sc.nextInt();
     System.out.println("Enter number of Columns for matrix 1: ");
     col1=sc.nextInt();
     System.out.println("Enter number of rows for matrix 2: ");
     row2=sc.nextInt();
     System.out.println("Enter number of Columns for matrix 2: ");
     col2=sc.nextInt(); 
     int a[][]=new int[row1][col1];
     int b[][]=new int[row2][col2];
     for(int i=0;i<row1;i++)
     {
         for(int j=0;j<col1;j++)
         {
             System.out.println("Enter element for 1st matrix: ");
             a[i][j]=sc.nextInt();
         }
        
     }
     for(int i=0;i<row2;i++)
     {
         for(int j=0;j<col2;j++)
         {
             System.out.println("Enter element for 2nd matrix: ");
             b[i][j]=sc.nextInt();
         }
        
     }
     System.out.println("Below is the 1st matrix: \n");
     for(int i=0;i<row1;i++)
     {
         for(int j=0;j<col1;j++)
         {
             System.out.print(a[i][j]);
             
         }
        System.out.println("");
     }
     
     System.out.println("Below is the 2nd matrix: \n");
     for(int i=0;i<row2;i++)
     {
         for(int j=0;j<col2;j++)
         {
             System.out.print(b[i][j]);
             
         }
        System.out.println("");
     }
     
     if(col1!=row2)
     {
         System.out.println("Matrix multiplication impossible!");
         System.exit(0);
     }
     else{
         int c[][]=new int[row1][col2];
         
         for(int i=0;i<row1;i++)
         {
             for(int j=0;j<col2;j++)
             {
                 c[i][j]=0;
                 for(int k=0;k<row2;k++)
                 {
                     c[i][j]=c[i][j]+a[i][k]*b[k][j];
                 }
             }
         }
         
     System.out.println("Below is the result matrix: \n");
     for(int i=0;i<col1;i++)
     {
         for(int j=0;j<row2;j++)
         {
             System.out.print(c[i][j]);
             
         }
        System.out.println("");
     }
     }   
     
    }
    
}

当两个矩阵具有相同的行数和列数时，代码工作正常。喜欢例如。3x3和3x3矩阵乘法工作正常。
尝试将不同大小的矩阵相乘时出错。尝试将一个2x3矩阵和一个3x4矩阵相乘，结果出错。