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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...
How can I make a multipart/form-data POST request using Java?
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These are the Maven dependencies I have.
Java Code:
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
FileBody uploadFilePart = new FileBody(uploadFile);
MultipartEntity reqEntity = new MultipartEntity();
reqEntity.addPart("up...
Java Generate Random Number Between Two Given Values [duplicate]
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With respect to the Java naming convention the variable names should start with lower case character
– Jens
May 19 '17 at 8:13
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How can I give the Intellij compiler more heap space?
...ss heap size.
Older versions:
Settings (Preferences on Mac) | Compiler | Java Compiler | Maximum heap size.
Compiler runs in a separate JVM by default so IDEA heap settings that you set in idea.vmoptions have no effect on the compiler.
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Running a Haskell program on the Android OS
...ramework (added since android 2.3) or you must write JNI glue code between Java-C-Haskell, the former option is the easier solution and if I remember correctly might actually be backwards compatible with previous versions of Android below 2.3.
Once you have this you must build Haskell code as share...
Java: Check if enum contains a given string?
... should never be used for ordinary control flow" (Joshua Bloch, "Effective Java").
– james.garriss
May 20 '14 at 16:34
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How do HashTables deal with collisions?
...tions which if you are lucky might send the objects to different buckets.
Java uses both option 1 and 2 in its hash table implementations.
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How can I truncate a double to only two decimal places in Java?
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If you want that for display purposes, use java.text.DecimalFormat:
new DecimalFormat("#.##").format(dblVar);
If you need it for calculations, use java.lang.Math:
Math.floor(value * 100) / 100;
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Stateless and Stateful Enterprise Java Beans
I am going through the Java EE 6 tutorial and I am trying to understand the difference between stateless and stateful session beans. If stateless session beans do not retain their state in between method calls, why is my program acting the way it is?
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Using Java 8 to convert a list of objects into a string obtained from the toString() method
There are a lot of useful new things in Java 8. E.g., I can iterate with a stream over a list of objects and then sum the values from a specific field of the Object 's instances. E.g.
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