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Why do we use __init__ in Python classes?
...ing to make sense..is it like how you have to predeclare your variables in java "String left" or something? then once its initialized to the class, you can manipulate the values? Its just a bit confusing when compared to functions because I can just send values to functions and don't need to initial...
Android Split string
...r ways to do it. For instance, you can use the StringTokenizer class (from java.util):
StringTokenizer tokens = new StringTokenizer(currentString, ":");
String first = tokens.nextToken();// this will contain "Fruit"
String second = tokens.nextToken();// this will contain " they taste good"
// in th...
Proper usage of Optional.ifPresent()
... am trying to understand the ifPresent() method of the Optional API in Java 8.
5 Answers
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How to instantiate non static inner class within a static method?
...de-notes, but I don't find them responsive to the actual question.
import java.awt.Graphics;
import java.awt.Color;
import javax.swing.JPanel;
import javax.swing.JFrame;
public class Example {
public class InnerClass extends JPanel {
public void paint(Graphics g) {
g.setCol...
How to extract epoch from LocalDate and LocalDateTime?
...
Convert from human readable date to epoch:
long epoch = new java.text.SimpleDateFormat("MM/dd/yyyyHH:mm:ss").parse("01/01/1970 01:00:00").getTime() / 1000;
Convert from epoch to human readable date:
String date = new java.text.SimpleDateFormat("MM/dd/yyyyHH:mm:ss").format(new java....
How do I convert a git repository to mercurial?
I've been developing a java application using git as source code repository. I'd like to share the project with other java developers and hg seems to be most used by them.
...
Regex for quoted string with escaping quotes
...\\.)*"/
Works in The Regex Coach and PCRE Workbench.
Example of test in JavaScript:
var s = ' function(){ return " Is big \\"problem\\", \\no? "; }';
var m = s.match(/"(?:[^"\\]|\\.)*"/);
if (m != null)
alert(m);
...
What is the source code of the “this” module doing?
...f the module, this, is also part of the joke because other languages (e.g. Java) use this similar to how Python uses self. Typing import this looks just as pointless as typing import java.self;.
– Luc
Jun 16 '16 at 21:57
...
Get first and last day of month using threeten, LocalDate
...rt a solution that matches closely to business requirements
import static java.time.temporal.TemporalAdjusters.*;
LocalDate initial = LocalDate.of(2014, 2, 13);
LocalDate start = initial.with(firstDayOfMonth());
LocalDate end = initial.with(lastDayOfMonth());
However, Jon's solutions are also fi...
how to File.listFiles in alphabetical order?
...
In Java 8:
Arrays.sort(files, (a, b) -> a.getName().compareTo(b.getName()));
Reverse order:
Arrays.sort(files, (a, b) -> -a.getName().compareTo(b.getName()));
...