can you help me with my java problem?

Question

when i run it it come out "ABCDE"

i want it  like this "AEDCB"

this is what i currently have
public class recursion2
{
 public static void main(String [] args)
 {
   char a [] = {'A', 'B','C','D','E'};
    System.out.println(a);
    Switch(a, 2,4);

}
  
   public static void  Switch(char a [], int b1, int b2)
{
    char tmp;
    if (b1 <= b2)
         return; 
    else
    {
        tmp = a[b1];
        a[b1] = a[b2];
        a[b2] = tmp;
        b1++;
        b2--;
        Switch(a, b1, b2);
    }
     
}
}

brilliant_moves · Accepted Answer

Try this:

public class OmarsRecursion {
	public static void main(String [] args) {
		char[] a = {'A', 'B', 'C', 'D', 'E'};
		System.out.println(a);
		Switch(a, 1, 4);
	}

public static void Switch(char[] a, int b1, int b2) {
		char tmp;
		if (b1 >= b2) {
			System.out.println (a);
			return;
		} else {
			tmp = a[b1];
			a[b1] = a[b2];
			a[b2] = tmp;
			b1++;
			b2--;
			Switch(a, b1, b2);
		}
	}
}

Pipsy · Answer

Firstly don't use return in a void function, secondly you need to relook at the your first if statement it says:

if (b1 <= b) {
do this..
}

and your b1 = 2 and your b2 = 4 so you tell me what's wrong?

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can you help me with my java problem?

2 Answers