تحديات برمجيةالتحدي الثاني - حل التمرين الأول بلغة جافا

public class Main {
    
    public static String removeAll(String s1, String s2) {
        
        int L1 = s1.length();
        int L2 = s2.length();
        String newS = "";
        
        for (int i = 0; i < L1;)
        {
            if (i <= L1 - L2 && s1.substring(i, i + L2).equals(s2))
            {
                i += L2;
            }
            else
            {
                newS += s1.charAt(i);
                i += 1;
            }

        }

        return newS;
    }

    
    public static void main(String[] args) {

        String text = "I like cats. I have one cat.";
        String keyword = "cat";
        String newText = removeAll(text, keyword);
        
        System.out.println("Before: " + text);
        System.out.println("After:  " + newText);
        
    }

}

Before: I like cats. I have one cat.
After:  I like s. I have one .