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Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
...ading issue related to tracking those hashes, but it turned out it was the java.security.MessageDigest class! It's not thread safe!
I swapped it out with a UID I was stuffing in every packet based on the device UUID and a timestamp. No problems since.
I guess the lesson I can impart to those that ...
Print an integer in binary format in Java
... do it by writing an algorithm, Is there any built-in function for that in Java?
21 Answers
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What is the reason for a red exclamation mark next to my project in Eclipse?
... Package Explorer and Project Explorer views now show a
new decorator on Java projects and working sets that contain build
path errors:
The concrete errors can be seen in the Problems view, and if you open
the view menu and select Group By > Java Problem Type, they all show
up ...
Eclipse Optimize Imports to Include Static Imports
...so has the Favorite preference section:
Window > Preferences > Java > Editor > Content Assist > Favorites
In mine, I have the following entries (when adding, use "New Type" and omit the .*):
org.hamcrest.Matchers.*
org.hamcrest.CoreMatchers.*
org.junit.*
org.junit.Assert.*
o...
How to parse date string to Date? [duplicate]
...o reconsider if you wouldn't rather like to use HH instead of kk. Read the javadoc for details about valid patterns.
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Android encryption / decryption using AES [closed]
...vation is used as it is more secured.
import android.util.Base64;
import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParam...
Java ByteBuffer to String
...
There's no k.getBytes() method in java.nio.ByteBuffer (may be not in the version am using). So I used k.array() method which will return byte[].
– Madura Pradeep
Apr 20 '16 at 9:29
...
Finding Number of Cores in Java
How can I find the number of cores available to my application from within Java code?
4 Answers
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What is the fastest way to compare two sets in Java?
...
You have the following solution from https://www.mkyong.com/java/java-how-to-compare-two-sets/
public static boolean equals(Set<?> set1, Set<?> set2){
if(set1 == null || set2 ==null){
return false;
}
if(set1.size() != set2.size()){
return fal...
What's wrong with overridable method calls in constructors?
... the object may be inconsistent and/or incomplete.
A quote from Effective Java 2nd Edition, Item 17: Design and document for inheritance, or else prohibit it:
There are a few more restrictions that a class must obey to allow inheritance. Constructors must not invoke overridable methods, directl...