Case 1: String str = “Good”; str = str + ” Morning”; In the above code you create 3 String Objects. “Good” it goes into the String Pool. ” Morning” it goes into the String Pool as well. “Good Morning” created by concatenating “Good” and ” Morning”. This guy goes on the Heap. Note: Strings … Read more
You don’t really want to overload std::stringbuf, you want to overload std::streambuf or std::basic_streambuf (if you want to support multiple character types), also you need to override the overflow method as well. But I also think you need to rethink your solution to your problem. cout is just an ostream, so if all classes / … Read more
This seems to be a question of mislead, because I happened to read that book just now. This part of text in the book is a typo! Here is the context: =================================================================== Question: What is the running time of this code? 1 public String makeSentence(String[] words) { 2 StringBuffer sentence = new StringBuffer(); 3 for … Read more
String is used to manipulate character strings that cannot be changed (read-only and immutable). StringBuffer is used to represent characters that can be modified. Performance wise, StringBuffer is faster when performing concatenations. This is because when you concatenate a String, you are creating a new object (internally) every time since String is immutable. You can … Read more
Firstly – no, you can’t get the address of an object in Java; at least, not pure Java with no debugging agent etc. The address can move over time, for one thing. You don’t need it. Secondly, it’s slightly hard to follow your explanation but you certainly won’t be able to get away without listening … Read more
Likely the shortest code using the String API, exclusively: String space10 = new String(new char[10]).replace(‘\0’, ‘ ‘); System.out.println(“[” + space10 + “]”); // prints “[ ]” As a method, without directly instantiating char: import java.nio.CharBuffer; /** * Creates a string of spaces that is ‘spaces’ spaces long. * * @param spaces The number of spaces … Read more
Difference between StringBuilder and StringBuffer