public class StringFallback {

/**

* Safely handles a string, providing a default value if the input is null or empty.

* @param str The input string.

* @param defaultString The string to use as a fallback.

* @return The original string if not null and not empty, otherwise the default string.

*/

public static String safeString(String str, String defaultString) {

if (str == null || str.isEmpty()) {

return defaultString; // Return default if null or empty

}

return str; // Return original if valid

}

public static void main(String[] args) {

String testString = null;

String defaultStr = "No String";

String result1 = safeString(testString, defaultStr);

System.out.println("Test 1: " + result1);

testString = "";

String result2 = safeString(testString, defaultStr);

System.out.println("Test 2: " + result2);

testString = "Hello";

String result3 = safeString(testString, defaultStr);

System.out.println("Test 3: " + result3);

}

}