How to compare each individual char of 2 string

[Tommy Leung]

Hi

I need to compare the each individual char of 2 string.

String a = "Ae12";
String b = "aE12";

// I tried the followings:
// a
String c = a.substring(0,0);
String d = a.substring(1,1);
String e = a.substring(2,2);
String f = a.substring(3,3);
// b
String c1 = b.substring(0,0);
String d1 = b.substring(1,1);
String e1 = b.substring(2,2);
String f1 = b.substring(3,3);

if(c.equalsIgnoreCase(c1)&&d.equalsIgnoreCase(d1)&&e.equalsIgnoreCase(e1)&&f.equalsIgnoreCase(f1)) // Cannot be compared

// and I tried the followings:
// a
char c = a.charAt(0);
char d = a.charAt(1);
char e = a.charAt(2);
char f = a.charAt(3);
// b
char c1 = b.charAt(0);
char d1 = b.charAt(1);
char e1 = b.charAt(2);
char f1 = b.charAt(3);

if(c==c1&&d==d1&&e==e1&&f==f1) // cannot be compared.

Both cases cannot be compared. How can I fix it?

Because I want to compare those 2 strings without case sensitive and numbers.

Thanks

[Phal Ach]

Try for loop it works. But it would be case sensitive. And it is always a bad idea to Store each and every characters in different variables and use lots of memory. Store them in variable on the fly in for loop. Compare it with charAt(index).

[Tommy Leung]

It must be case insensitive.

[Phal Ach]

It can be case insensitive too. The you have to use substring(begin index, end index) along with for loop. Your code will be done in 8-9 lines.

[fred rosenberger]

why do you think things cannot be compared this way? what exactly is wrong with this code?

granted it's not pretty, but why doesn't it work??? i took this:

public class Slop {
 
     public static void main(String [] args)
    {
        String a = "Ae12";
        String b = "aE12";
 
        // I tried the followings:
        // a
        String c = a.substring(0,0);
        String d = a.substring(1,1);
        String e = a.substring(2,2);
        String f = a.substring(3,3);
        // b
        String c1 = b.substring(0,0);
        String d1 = b.substring(1,1);
        String e1 = b.substring(2,2);
        String f1 = b.substring(3,3);
 
        if(c.equalsIgnoreCase(c1)&&d.equalsIgnoreCase(d1)&&e.equalsIgnoreCase(e1)&&f.equalsIgnoreCase(f1))
        {
            System.out.println("same");
        }
        else
        {
            System.out.println("different");
        }
    }
}

and got this output:

C:\slop>java Slop
same

it looks like it worked to me...
[ June 12, 2008: Message edited by: fred rosenberger ]