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How to do a batch insert in MySQL
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A good blog entry on batch inserts (in Java, but it's relevant to any language): viralpatel.net/blogs/batch-insert-in-java-jdbc
– Kangur
Oct 3 '12 at 8:21
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Deprecated Java HttpClient - How hard can it be?
...leHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import java.io.IOException;
Usage:
HttpClient httpClient = HttpClientBuilder.create().build();
EDIT (after Jules' suggestion):
As the build() method returns a CloseableHttpClient which is-a AutoClosable, you can place the decl...
How to compare two Dates without the time portion?
I would like to have a compareTo method that ignores the time portion of a java.util.Date. I guess there are a number of ways to solve this. What's the simplest way?
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Didn't Java once have a Pair class? [duplicate]
Am I remembering incorrectly, or did Java, once upon a time, provide a Pair class as part of its API?
10 Answers
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Java: Static Class?
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According to the great book "Effective Java":
Item 4: Enforce noninstantiability with a private constructor
- Attempting to enforce noninstantiability by making a class abstract does not work.
- A default constructor is generated only if a class contains no exp...
“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]
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Unfortunatelly it changes with Java versions, so some standardisation might be still required. (For example using %JAVA_1_7_HOME% like Apache Commons is doing (since toolchain might not be ready for beeing used in those situations).
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Redeploy alternatives to JRebel [closed]
... at runtime. The features of DCEVM may be integrated in a future update of Java as part of JEP 159.
The binaries available on the original site are limited to Java 6u25 and to early versions of Java 7. The project has been forked on Github and supports recent versions of Java 7 and 8. The maintaine...
Java: how do I get a class literal from a generic type?
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You can't due to type erasure.
Java generics are little more than syntactic sugar for Object casts. To demonstrate:
List<Integer> list1 = new ArrayList<Integer>();
List<String> list2 = (List<String>)list1;
list2.add("foo"); // perf...
How to parse a JSON string to an array using Jackson
...Type()" by "constructCollectionType()" or any other type you need.
import java.io.IOException;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
public class Sorting {
private Stri...
How to convert Java String into byte[]?
Is there any way to convert Java String to a byte[] ( not the boxed Byte[] )?
8 Answers
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