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Naming threads and thread-pools of ExecutorService
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The BasicThreadFactory from apache commons-lang is also useful to provide the naming behavior. Instead of writing an anonymous inner class, you can use the Builder to name the threads as you want. Here's the example from the javadocs:
// Create a factory that produc...
How to convert a String into an ArrayList?
...acle.com/javase/8/docs/api/java/util/regex/Pattern.html#splitAsStream-java.lang.CharSequence-. Since you don't need the array at all, avoid creating it thus:
// This will presumably be a static final field somewhere.
Pattern splitter = Pattern.compile("\\s+");
// ...
String untokenized = reader.re...
How to check String in response body with mockMvc
...ase try with different username\""));
Of course my assertion fail:
java.lang.AssertionError: Response content expected:
<"Username already taken - please try with different username"> but was:<"Something gone wrong">
because:
MockHttpServletResponse:
Body = "Something...
How to upper case every first letter of word in a string? [duplicate]
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import org.apache.commons.lang.WordUtils;
public class CapitalizeFirstLetterInString {
public static void main(String[] args) {
// only the first letter of each word is capitalized.
String wordStr = WordUtils.capitalize("this is f...
How do you specify a byte literal in Java?
...ion. It's common sense if you both understand compilers and have faith in language designers (which we should), but otherwise not so obvious.
– Philip Guin
Nov 13 '13 at 5:29
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How to check if a string starts with one of several prefixes?
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Besides the solutions presented already, you could use the Apache Commons Lang library:
if(StringUtils.startsWithAny(newStr4, new String[] {"Mon","Tues",...})) {
//whatever
}
Update: the introduction of varargs at some point makes the call simpler now:
StringUtils.startsWithAny(newStr4, "Mon"...
How can I give the Intellij compiler more heap space?
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I was facing "java.lang.OutOfMemoryError: Java heap space" error while building my project using maven install command.
I was able to get rid of it by changing maven runner settings.
Settings | Build, Execution, Deployment | Build Tools | Mav...
':app:lintVitalRelease' error when generating signed apk
...abling them. In my case, they were about some missing strings for specific languages. Hit "Analyze" -> "Inspect code .."
– Markus
May 29 '18 at 14:11
2
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How can I truncate a double to only two decimal places in Java?
...Format("#.##").format(dblVar);
If you need it for calculations, use java.lang.Math:
Math.floor(value * 100) / 100;
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Properly removing an Integer from a List
...you could still ensure proper behaviour by using the fact that remove(java.lang.Object) operates on arbitrary objects:
myList.remove(new Object() {
@Override
public boolean equals(Object other) {
int k = ((Integer) other).intValue();
return k == 1;
}
}
...