sort string

[vbbit]

Hello, I am trying to write a simple sort string without using the array sort method. But it's not working. please help

 public static String sort(String s) {
    	StringBuffer s1 = new StringBuffer(s);
    	s1.sort();
    	return s1.toString();
    }

[ComputerJy]

I don't know what you are trying to achieve. But here is some code that uses a simple buble sort

    public static String sort(String string)
    {
        for(int i=0;i<string.length()-1;i++)
            for(int j=i+1;j<string.length();j++)
                if(Character.toLowerCase(string.charAt(j))<Character.toLowerCase(string.charAt(i)))
                    string = swap(string,i,j);
        return string;
    }
    
    private static String swap(String s, int i, int j)
    {
        char[] chars=s.toCharArray();
        char tmp=chars[i];
        chars[i]=chars[j];
        chars[j]=tmp;
        return new String(chars);
    }

[vbbit]

Hello, yeah it works. but could you explain to me about the code below? I could not get it at all, especially with 2 dimensional arrays:

private static String swap(String s, int i, int j)
    {
        char[] chars=s.toCharArray();
        char tmp=chars[i];
        chars[i]=chars[j];
        chars[j]=tmp;
        return new String(chars);
    }

[ComputerJy]

private static String swap(String s, int i, int j)
    {
        // Convert String to char array
        char[] chars=s.toCharArray();
        // store char number i in temporary variable
        char tmp=chars[i];
        // replace char[i] with char[j]
        chars[i]=chars[j];
        // replace char [j] with the temp value (old i value)
        chars[j]=tmp;
        // Return a new string from the partially sorted char array
        return new String(chars);
    }