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Get ID of last inserted document in a mongoDB w/ Java driver
...D (ObjectID) of the last inserted document of a mongoDB instance using the Java driver?
8 Answers
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How to import a class from default package
...h the default package. I have one class in default package - Calculations.java and I want to make the use of that class in any of the package (for instance in com.company.calc ). When I try to make the use of the class which is in the default package, it's giving me a compiler error. It's not abl...
GUI not working after rewriting to MVC
...n questions about Swing controllers are addressed here and here.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
imp...
Are static methods inherited in Java?
I was reading A Programmer’s Guide to
Java™ SCJP Certification by Khalid Mughal.
14 Answers
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Best way to build a Plugin system with Java
How would you implement a Plugin-system for your Java application?
8 Answers
8
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adding multiple entries to a HashMap at once in one statement
..., 3);
}};
As a piece of warning, please refer to the thread Efficiency of Java “Double Brace Initialization" for the performance implications that it might have.
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How to pass an ArrayList to a varargs method parameter?
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@JoshM. Java needs a lot of things. ;) I also (coming from a C# background) miss index operators. Working with dictionaries is much more smooth in C# than working with HashMaps in Java.
– Per Lundberg
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Difference between null and empty (“”) Java String
...ength()
a.substring(0, 1)
and so on.
If the String equals null, like b, Java would throw a NullPointerException if you tried invoking, say:
b.length()
If the difference you are wondering about is == versus equals, it's this:
== compares references, like if I went
String a = new String("");...
How to create a .jar file or export jar on IntelliJ (like eclipse java archive export) [duplicate]
I was using IntelliJ-IDEA IDE , I want to create a jar file from java compiled class files. but I not found command or file, How to create a jar file (like eclipse java archive export)
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Best way to compare 2 XML documents in Java
...r XMLUnit 1 on SourceForge. Also, the sourceforge page states "XMLUnit for Java 1.x will still be maintained".
– Yngvar Kristiansen
Feb 25 '16 at 8:00
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