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Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
...ipse is not really right (that's what happened to me, I just wanted to use javax.smartcardio). In that case, we get this error in Eclipse.
Solution
The solution is to change the access restrictions.
Go to the properties of your Java project,
i.e. by selecting "Properties" from the context ...
What is the difference between javac and the Eclipse compiler?
Is Eclipse's Java compiler just a wrapper around the same core that the javac program is wrapped around, or is it a separate compiler altogether? If the latter, why would they reinvent the wheel?
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What is the difference between Set and List?
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WRONG! A Java set can be ordered, depending on the implementation; for example, a Java TreeSet is ordered. In the context of Java, the only difference between a List and a Set is that the Set contains unique items. In the context of m...
How to check if a folder exists
I am playing a bit with the new Java 7 IO features, actually I trying to receive all the xml files of a folder. But this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
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Java equivalents of C# String.Format() and String.Join()
... a newbie question, but are there equivalents to C#'s string operations in Java?
16 Answers
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How to create a memory leak in Java?
I just had an interview, and I was asked to create a memory leak with Java.
Needless to say, I felt pretty dumb having no clue on how to even start creating one.
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IntelliJ IDEA 13 uses Java 1.5 despite setting to 1.7
...wing error is produced by IntelliJ 13 when trying to compile some simple Java 7 code which does use the diamond operator:
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Is it possible to make anonymous inner classes in Java static?
In Java, nested classes can be either static or not. If they are static , they do not contain a reference to the pointer of the containing instance (they are also not called inner classes anymore, they are called nested classes).
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Java - sending HTTP parameters via POST method easily
...out. Change the URL and the POST params as appropriate, of course:
import java.io.*;
import java.net.*;
import java.util.*;
class Test {
public static void main(String[] args) throws Exception {
URL url = new URL("http://example.net/new-message.php");
Map<String,Object> p...
Java SafeVarargs annotation, does a standard or best practice exist?
I've recently come across the java @SafeVarargs annotation. Googling for what makes a variadic function in Java unsafe left me rather confused (heap poisoning? erased types?), so I'd like to know a few things:
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