class Main { public static void main(String[] args) { String str1 = "Programming"; // true or false String str2 = "Programming"; String str3 = new String("Programming"); System.out.println(str1==str2); // true System.out.println(str1==str3); // false System.out.println(str1.equals(str3)); // true System.out.println(str2.equals(str3)); // true } } str1==str2: str1과 str2는 모두 문자열 리터럴인 "Programming"..