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Choosing the best concurrency list in Java [closed]
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had better be List
The only List implementation in java.util.concurrent is CopyOnWriteArrayList. There's also the option of a synchronized list as Travis Webb mentions.
That said, are you sure you need it to be a List? There are a lot more options for concurrent Queues and M...
Wrapping chained method calls on a separate line in Eclipse for Java
...you exactly need is the following:
Windows: Window → Preferences → Java → Code Style
→ Formatter → Edit → Line wrapping (tab)
Mac OS: ADT → Preferences → Java → Code Style
→ Formatter → Edit → Line wrapping (tab)
Then, in the list at the left, select:
Fu...
Java code To convert byte to Hexadecimal
...m.out.println(sb.toString());
// prints "FF 00 01 02 03 "
See also
java.util.Formatter syntax
%[flags][width]conversion
Flag '0' - The result will be zero-padded
Width 2
Conversion 'X' - The result is formatted as a hexadecimal integer, uppercase
Looking at the text of the questio...
How to wait for a number of threads to complete?
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The book “Effective Java” recommends avoiding thread groups (item 73).
– Bastien Léonard
Aug 9 '09 at 20:47
2
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How to convert String to Long in Kotlin?
...o number conversion.
public inline fun String.toLong(radix: Int): Long = java.lang.Long.parseLong(this, checkRadix(radix))
4. string.toLongOrNull(10)
Parses the string as a [Long] number and returns the result or null
if the string is not a valid representation of a number.
@throws I...
Parsing JSON array into java.util.List with Gson
...tring> and then parse the JSON array into that Type, like this:
import java.lang.reflect.Type;
import com.google.gson.reflect.TypeToken;
JsonElement yourJson = mapping.get("servers");
Type listType = new TypeToken<List<String>>() {}.getType();
List<String> yourList = new Gson...
Accept server's self-signed ssl certificate in Java client
...and import it in your JVM truststore (to establish a chain of trust):
<JAVA_HOME>\bin\keytool -import -v -trustcacerts
-alias server-alias -file server.cer
-keystore cacerts.jks -keypass changeit
-storepass changeit
Option 2
Disable Certificate Validation:
// Create a trust manager that ...
Invoking a static method using reflection
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Fromthe Javadoc of Method.invoke():
If the underlying method is static, then the specified obj argument is ignored. It may be null.
What happens when you
Class klass = ...;
Method m = klass.getDeclaredMethod(methodName, paramty...
Failed to locate the winutils binary in the hadoop binary path
...OOP_HOME to extracted directory [path], but also provide system property -Djava.library.path=[path]\bin to load native libs (dll).
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Difference between the Apache HTTP Server and Apache Tomcat? [closed]
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Apache Tomcat is used to deploy your Java Servlets and JSPs. So in your Java project you can build your WAR (short for Web ARchive) file, and just drop it in the deploy directory in Tomcat.
So basically Apache is an HTTP Server, serving HTTP. Tomcat is a Servle...