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Spring vs EJB. Can Spring replace EJB? [closed]
...n to support the EJB standard can, in theory, be ported from one compliant Java EE app server to another. But that means staying away from any and all vendor-specific extensions that lock you in to one vendor.
Spring ports easily between app servers (e.g., WebLogic, Tomcat, JBOSS, etc.) because it...
How do I clone a generic List in Java?
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docs.oracle.com/javase/8/docs/api/java/util/… Doesn't work because the list sizes are different.
– MLProgrammer-CiM
Mar 30 '16 at 17:59
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Java: PrintStream to String?
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Use a ByteArrayOutputStream as a buffer:
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final String utf8 = StandardCharsets.UTF_8.name();
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How to use Comparator in Java to sort
....format("{name=%s, age=%d}", name, age);
}
}
EDIT
And an equivalent Java 8 demo would look like this:
public class ComparatorDemo {
public static void main(String[] args) {
List<Person> people = Arrays.asList(
new Person("Joe", 24),
new Pers...
Does Java have a complete enum for HTTP response codes?
I'm wondering if there is an enum type in some standard Java class library that defines symbolic constants for all of the valid HTTP response codes. It should support conversion to/from the corresponding integer values.
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Abstract class in Java
What is an "abstract class" in Java?
14 Answers
14
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How to create a directory in Java?
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As of Java 7, you should probably use the methods in Files as in the more recent answer by Benoit Blanchon. (This answer appears to have been written before Java 7.)
– Brick
Sep 8 '16 at 16:58...
What is the better API to Reading Excel sheets in java - JXL or Apache POI [closed]
...re are many differences:
Perhaps the most significant difference is that Java JXL does not support the Excel 2007+ ".xlsx" format; it only supports the old BIFF (binary) ".xls" format. Apache POI supports both with a common design.
Additionally, the Java portion of the JXL API was last updated in...
What is boxing and unboxing and what are the trade offs?
...e the expected metadata and structure that other data structures have.
In Java and Haskell generic collections can't contain unboxed values. Generic collections in .NET can hold unboxed values with no penalties. Where Java's generics are only used for compile-time type checking, .NET will generat...
If strings are immutable in .NET, then why does Substring take O(n) time?
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It would be interesting to contrast how Java does (or at least did at some point in the past) it: Substring returns a new string, but pointing at the same char[] as the larger string - that means that the larger char[] can no longer be garbage collected until the s...