using reverse methode

[analoveu]

I wanna print the following shape

1
121
12321
1234321
12321
121
1

and I use the following code,put there are alot of errors
I want to know how i use the method toString to correct these errors

class Diamond { 

   // main method begins execution of Java application
   
   public static void main( String args[] )
   {
   
   for(int x=0 ; x<=3 ; x++)
    {
        System.out.print(numbers(x));
        numbers(x);
        String r=numbers(x); 
        String reversedString=reverse(r);
        System.out.print(reversedString);
        System.out.print("\n");


   if(x==3)
     for(x=x-1; x!=1 ; x--)
      {
      	String y=numbers(x);
      	y.toString();
        System.out.print(y);
        numbers(x);
        String r=numbers(x); 
        String reversedString=reverse(r);
        System.out.prin(reversedString);
        System.out.print("\n");
      }
    }



}
String numbers (int x)
{
   String p="";
int n=1;
int k=1;
   for( ; k<n+x ; k++)
    
      
      p+=k; 
    
      
      System.out.print(n+x) ;
      return p;  
}

}

Is my using for the method numbers, printing the return string,and reversing the the return string wrong?

[horace1]

your algorithm looks very complex - for example why do you want to reverse the string? (if you do you can use the reverse methods in StringBuffer)

I think you may be trying to do too much at one go
why not build it in stages? try to write a program to print
1
12
123
1234

then when that works
1
121
12321
1234321

then complete the top half of the dimond etc
the bottom half is the reverse of the top - is where you want reverse?

[analoveu]

I go upon that algorithm

x n
-----------------------------------------------------------------------------------
0 n
1 n n+1 n
2 n n+1 n+2 n-1 n
3 n n+1 n+2 n+3 n+2 n+1 n
2 n n+1 n+2 n-1 n
1 n n+1 n
0 n

where x represents vertical column of the numbers 0123210 and n represents the diamond n numbers
the method numbers returns a string that contain the numbers from n to n+x ,for example while x=3 it return 123 , and prints the number n+3 or 4
In the Main Method
first I call the method in print method to print the number from n to n+x-1 for example 123 then call the method to print the number n+x or 4 then reverse the return value to reverse 123 to obtain 321 and print it in the same line
But as you see i have a problem in using the reverse method with the method which i create it "numbers" and also in printing the return value of this method
especially in these lines

System.out.print(numbers(x));
String r=numbers(x); 
String reversedString=reverse(r);

[horace1]

would reverse do what you want, e.g. line 3 should be
12321

but using reverse would give
123321

with an extra 3 in the middle

[analoveu]

would reverse do what you want, e.g. line 3 should be
12321

but using reverse would give
123321

with an extra 3 in the middle

noo it will give 12321
because my method returns the string 12 and print the number 3 and reversing my method print 21
so after concatinate all of them give 12321

but my problem is how to use the reverse method

[vieri3217]

i want to implement printMe() method so that the array content is printed out in

revese order (last entered, first printed).

heres the code:
_______________ _______________ _______________ _______________
Hi ... user input
there ... user input
cp2 ... user input
cp2 : there : Hi ... program output

import java.util.*;
class A1{
public static void main(String[] args){
String[] arr = new String[3];
Scanner in = new Scanner(System. in);
arr[0] = in.next();
arr[1] = in.next();
arr[2] = in.next();
System.out.prin tln(arr[2] + " : " + arr[1] + " : " + arr[0]);
}
}

[Ganon11]

i want to implement printMe() method so that the array content is printed out in

revese order (last entered, first printed).

heres the code:
_______________ _______________ _______________ _______________
Hi ... user input
there ... user input
cp2 ... user input
cp2 : there : Hi ... program output

import java.util.*;
class A1{
public static void main(String[] args){
String[] arr = new String[3];
Scanner in = new Scanner(System. in);
arr[0] = in.next();
arr[1] = in.next();
arr[2] = in.next();
System.out.prin tln(arr[2] + " : " + arr[1] + " : " + arr[0]);
}
}

Please ask your question in your own thread and not in someone else's thread.

[reon]

i think you didnt declared that variable named numbers....
27 th line spelling mistake in print....