(java programming:methods): program you are to write will create & fill an 9x9,

Question

(java programming:methods): program you are to write will create & fill an 9x9, 2 dmensional array with randomly gererated letters a to d. program will analyze & re-port if it finds at least 3 consecutive letters in any row, column, diagonal(upper left to lower right), or sub-diagonal(upper right to lower left). nothing is reported if no consecutive letters are found. only one analysis per row or column is needed. once a match has been found you are to move to the next row, column, etc.your program should have at least one method to: generate, display, and complete each analysis.
MUST: generate & display a 9x9, 2 dimension array of characters filled with a,b,c,d.
correctly analyzes the matrix row
correctly analyzes the matrix column
correctly analyzes the matrix diagonal
correctly analyzes the matrix sub-diagonal
meaningful identifers, internal and javadoc comments

Explanation / Answer

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import java.util.*;
    public class mat
   {
      public static void main(String[] args)
      {int n=9,i;
        char[][] a = new char [n][n];
        a=fillarray(n);    //fill array
        display(a,n);      //display array
        for(i=0;i<n;i++)
            if(row(a,n,i)) //check rows
                  System.out.println("row "+i+" has 3 in a row");
            else
                  System.out.println("row "+i+" does not have 3 in a row");
           
        for(i=0;i<n;i++)
            if(col(a,n,i)) //check columns
                  System.out.println("column "+i+" has 3 in a row");
            else
                  System.out.println("column "+i+" does not have 3 in a row");
         
       if(diag1(a,n))   //check main diagonal
                  System.out.println("main diagonal has 3 in a row");
            else
                  System.out.println("main diagonal does not have 3 in a row");
                if(diag2(a,n)) //check sub diagonall
                  System.out.println("sub-diagonal has 3 in a row");
            else
                  System.out.println("sub-diagonal does not have 3 in a row");

          }
public static boolean col(char a[][],int n,int c)
{int i;
for(i=1;i<n-1;i++)
     if(a[i][c]==a[i-1][c]&&a[i-1][c]==a[i+1][c]) //check adjacent columns
           return true;
return false;
}
public static boolean row(char a[][],int n,int r)
{int i;
for(i=1;i<n-1;i++)     //check adjacent rows
     if(a[r][i]==a[r][i-1]&&a[r][i-1]==a[r][i+1])
           return true;
return false;
}
public static boolean diag1(char a[][],int n)
{int i;
for(i=1;i<n-1;i++)   //check adjacents on main diagonal
     if(a[i][i]==a[i-1][i-1]&&a[i-1][i-1]==a[i+1][i+1])
           return true;
return false;
}
public static boolean diag2(char a[][],int n)
{int i;
for(i=1;i<n-1;i++)    //check adjacents on sub diagonal
     if(a[i][n-i-1]==a[i-1][n-i]&&a[i-1][n-i]==a[i+1][n-2-i])
           return true;
return false;
}
public static char[][] fillarray(int n)
{int i,j;
Random r=new Random();
char[][] a = new char [n][n];
        for(i=0;i<n;i++)
           for(j=0;j<n;j++)
               a[i][j]=(char)(r.nextInt('d'-'a'+1)+'A'); //generate a-d                }
return a;
}
public static void display(char a[][],int n)
{    int i,j;
System.out.println("The Matrix:");
System.out.print(" ");   //space
for(i=0;i<n;i++)        //label columns
      System.out.print(i+" ");
System.out.println();
        for(i=0;i<n;i++)
           {System.out.print(i+" ");   //print row *
            for(j=0;j<n;j++)
               System.out.print(a[i][j]+" ");
            System.out.println(" ");
            }
}
}

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