1.4

1.4

public class replacespace{
    public static void main(String[] args)
    {
        String teststring = "Mr John Smith     sdfsf sdfs  sssf d s";
        char[] testchar = teststring.toCharArray();
        char[] imput = new char[100];
        for(int i = 0; i < testchar.length; i++)
            imput[i] = testchar[i];
        char[] result = replacespace(imput,testchar.length);
        System.out.println(String.valueOf(result));
    }
    
    public static  char[] replacespace(char[] imput,int length)
    {
        int count = 0;
        
        for(int i = 0; i < imput.length; i++)
        {
            if(imput[i] == ' ')
            {
                count++;
            }
        }
        
        for(int i = length; i >= 0; i--)
        {
            if(imput[i] == ' ')
            {
                imput[i + count * 2] = '0';
                imput[i + count * 2 - 1] = '2';
                imput[i + count * 2 - 2] = '%';
                count--;
            }
            else
                imput[i+count*2] = imput[i];
        }
        
        return imput;
    }
}