[pao]

Code:

public class StringReplace {
    
    public static void main(String[] args) {
        StringReplace replace = new StringReplace();
        String newSentence = replace.reverseAndReplace("backwards be should string This", "backwards", "forwards");
        System.out.println(newSentence);
    }
    
    public String reverseAndReplace(String original, String toBeReplaced, String replacement) {
        
        String[] backwardsSplit = original.split(" ");
        StringBuffer forwards = new StringBuffer();
        
        for(int i = backwardsSplit.length; i >0; i--) {
            String word = backwardsSplit[i - 1];
            if(word.equals(toBeReplaced)) {
                forwards.append(replacement + " ");
            } else {
                forwards.append(word + " ");
            }
        }
        
        return forwards.toString();
    }
    
}