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What is the advantage of using abstract classes instead of traits?
... have constructor parameters
Abstract classes are fully interoperable with Java. You can call them from Java code without any wrappers. Traits are fully interoperable only if they do not contain any implementation code
shar...
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...
Generating a Random Number between 1 and 10 Java [duplicate]
I want to generate a number between 1 and 10 in Java.
3 Answers
3
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Can a java file have more than one class?
What is the purpose of having more than one class in a Java file ? I am new to Java.
18 Answers
...
How to keep/exclude a particular package path when using proguard?
...ch can break your code. You can see the mapping in the mapping print out:
java.lang.String toString() -> toString
int getMemoizedSerializedSize() -> getMemoizedSerializedSize
void setMemoizedSerializedSize(int) -> setMemoizedSerializedSize
int getSerializedSize() -> getSerializedSize
bo...
Is there a Java equivalent or methodology for the typedef keyword in C++?
...redibly helpful. Do you know of a way to achieve similar functionality in Java, whether that be a Java mechanism, pattern, or some other effective way you have used?
...
How is pattern matching in Scala implemented at the bytecode level?
...rint your program with all Scala-specific features removed. It's basically Java in Scala's clothing. Here's the relevant scalac -print output for the code snippet you gave:
def eval(e: Expr): Int = {
<synthetic> val temp10: Expr = e;
if (temp10.$isInstanceOf[Number]())
temp10.$asInsta...
Java List.contains(Object with field value equal to x)
...
Streams
If you are using Java 8, perhaps you could try something like this:
public boolean containsName(final List<MyObject> list, final String name){
return list.stream().filter(o -> o.getName().equals(name)).findFirst().isPresent();
}...
Best way to encode text data for XML in Java?
Very similar to this question , except for Java.
21 Answers
21
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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
...
When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled", ...