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Limit a stream by a predicate
Is there a Java 8 stream operation that limits a (potentially infinite) Stream until the first element fails to match a predicate?
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How do I call one constructor from another in Java?
...structor parameters are used, consider a builder. See Item 2 of "Effective Java" by Joshua Bloch.
– koppor
Nov 13 '12 at 20:16
5
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Generating all permutations of a given string
...a and ab , but what about longer string such as abcdefgh ? Is there any Java implementation example?
52 Answers
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Regex doesn't work in String.matches()
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Welcome to Java's misnamed .matches() method... It tries and matches ALL the input. Unfortunately, other languages have followed suit :(
If you want to see if the regex matches an input text, use a Pattern, a Matcher and the .find() me...
Combining multiple @SuppressWarnings annotations - Eclipse Indigo
...for a list parameter. When using an SDK to run Eclipse (or when having the Java sources attached), you can simply hit F3 on any annotation to see its source declaration, thereby also seeing how many (and which) parameters it needs.
– Bananeweizen
Oct 25 '12 at ...
Function overloading by return type?
...Note, for comparison, that in Haskell there are no implicit conversions.)
Java (Java Language Specification 9.4.1): "One of the inherited methods must be return-type-substitutable for every other inherited method, or else a compile-time error occurs." (Yes, I know this doesn't give a rationale. I...
Eclipse: quick search on filename
...ox in the top of package explorer which could filter showing packages and .java files depending of entered text. Anyone knows something like that?
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Elasticsearch query to return all records
...btained page
https://gist.github.com/drorata/146ce50807d16fd4a6aa
Using java client
import static org.elasticsearch.index.query.QueryBuilders.*;
QueryBuilder qb = termQuery("multi", "test");
SearchResponse scrollResp = client.prepareSearch(test)
.addSort(FieldSortBuilder.DOC_FIELD_NAM...
How can we print line numbers to the log in java
... seen are slow. You are better off using a logging framework like that in java.util.logging package or log4j. Using these packages you can configure your logging information to include context down to the class name. Then each log message would be unique enough to know where it came from. As a r...
Make a negative number positive
I have a Java method in which I'm summing a set of numbers. However, I want any negatives numbers to be treated as positives. So (1)+(2)+(1)+(-1) should equal 5.
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