object-to-string

In the following code, how is toString() is implicitly called? class Payload { private int weight; public Payload (int w) { weight = w; } public void setWeight(int w) { weight = w; } public String toString() { return Integer.toString(weight); } } public class testpayload { static void changePayload(Payload p) { p.setWeight(420); } public static void main(String[] args) { Payload p = new Payload(200); p.setWeight(1024); changePayload(p); System.out.println("p is " + p); } } This line: System.out.println("p is " + p); uses string concatenation, which is specified in section 15.18.1 of the JLS,

Sometimes when I call a class's .ToString() method, it returns the fully qualified name of the class. But for some class's/struct's (like Int32 ) it returns a string correspoding to the object (value of the integer). Does this mean the Int32 class overrides the ToString() method, and classes that return fully qualified names don't override it, but instead just call base's ( Object 's) ToString() method? Does the Object.ToString() implementation just return the class's fully qualified name? Sometimes when I call the ToString method it returns the fully qualified name of the runtime type of the

I am working on exercise 41 in learnpythonthehardway and keep getting the error: Traceback (most recent call last): File ".\url.py", line 72, in <module> question, answer = convert(snippet, phrase) File ".\url.py", line 50, in convert result = result.replace("###", word, 1) TypeError: Can't convert 'bytes' object to str implicitly I am using python3 while the books uses python2, so I have made some changes. Here is the script: #!/usr/bin/python # Filename: urllib.py import random from random import shuffle from urllib.request import urlopen import sys WORD_URL = "http://learncodethehardway.org