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How do I get the first n characters of a string without checking the size or going out of bounds?
How do I get up to the first n characters of a string in Java without doing a size check first (inline is acceptable) or risking an IndexOutOfBoundsException ?
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How much faster is C++ than C#?
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There is no strict reason why a bytecode based language like C# or Java that has a JIT cannot be as fast as C++ code. However C++ code used to be significantly faster for a long time, and also today still is in many cases. This is mainly due to the more advanced JIT optimizations being compl...
Length of string in bash
...n string length and byte length:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLcAll=$LC_ALL
LANG=C LC_ALL=C
bytlen=${#myvar}
LANG=$oLang LC_ALL=$oLcAll
printf "%s is %d char len, but %d bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Généralités is 11 char len, but 14 bytes len....
What is a StackOverflowError?
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@JB King: Doesn't really apply to Java, where only primitive types and references are kept on the stack. All the big stuff (arrays and objects) is on the heap.
– jcsahnwaldt Reinstate Monica
Jan 23 '15 at 2:25
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Using Enums while parsing JSON with GSON
...gisterTypeAdapter(Type, Object).
Following is one such approach.
import java.io.FileReader;
import java.lang.reflect.Type;
import java.util.List;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeseria...
How do I get currency exchange rates via an API such as Google Finance? [closed]
... Hi @Keyo, when i try the YQL sample u have provided within my java code which tries to read as a URL i get an IO Exception (Server returned HTTP response code: 400 for URL: query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.xchange where pair in ("USDEUR")&env=store://d...
JUnit tests pass in Eclipse but fail in Maven Surefire
...ests -->
<excludes>
<exclude>**/IT*Test.java</exclude>
<exclude>**/integration/*Test.java</exclude>
</excludes>
</configuration>
<executions>
<execution>
<id>integration...
When should we call System.exit in Java
In Java, What is the difference with or without System.exit(0) in following code?
10 Answers
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Exact difference between CharSequence and String in java [duplicate]
...you pasted: simply compile that, and have a look at the JVM bytecode using javap -v. There you will notice that both obj and str are references to the same constant object. As a String is immutable, this kind of sharing is all right.
The + operator of String is compiled as invocations of various St...
Why doesn't JUnit provide assertNotEquals methods?
...e expressive than assert*, but I don't think it's more expressive than the java expression you can put inside and out of the assert* expression in general (after all I can express anything in java code). It's a general problem I've started coming across with fluent-style APIs - every one is basicall...