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Groovy: what's the purpose of “def” in “def x = 0”?
...rts.
e.g. In this snippet I have to import FileChannel
// Groovy imports java.io.* and java.util.* automatically
// but not java.nio.*
import java.nio.channels.*
class Foo {
public void bar() {
FileChannel channel = new FileInputStream('Test.groovy').getChannel()
println chan...
Disable Logback in SpringBoot
... It doesn't work for me because if I add those exclusions I get: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory.
– Ariel
Sep 15 '14 at 11:10
2
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Java equivalent to Explode and Implode(PHP) [closed]
I am new in Java although had a good experience in PHP, and looking for perfect replacement for explode and implode (available in PHP) functions in Java.
...
Java split string to array [duplicate]
...{
String testString = "Real|How|To|||";
System.out.println
(java.util.Arrays.toString(testString.split("\\|")));
// output : [Real, How, To]
}
}
The result does not include the empty strings between the "|" separator. To keep the empty strings :
public class StringSplit {
p...
What is meant by immutable?
...be the dumbest question ever asked but I think it is quite confusing for a Java newbie.
17 Answers
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What is PECS (Producer Extends Consumer Super)?
... syntax and assumes declaration-site variance, which is quite different to Java's weird call-site variance... Maybe I should write a more detailed answer that clearly shows how this sketch applies to Java...
– Andrey Tyukin
Jun 15 '14 at 23:11
...
Convert String[] to comma separated string in java
... go and guess because the answer posted in 2011 long before the release of Java 8 ;)
– Nico Huysamen
Apr 10 '18 at 4:50
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show 4 more commen...
List vs List
...variance and sub- and supertypes (that is, polymorphism) in general and to Java in particular. This may be well understood by the OP, but just in case, here it goes:
Covariance
If you have a class Automobile, then Car and Truck are their subtypes. Any Car can be assigned to a variable of type Auto...
What is the gain from declaring a method as static
... a first class Function concept that allows that, so static is not needed. Java 8 will have lambda expressions integrated, so we are moving into this direction already.
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In which language are the Java compiler and JVM written?
In which languages are the Java compiler ( javac ), the virtual machine (JVM) and the java starter written?
9 Answers
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