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How and where are Annotations used in Java?
...reating a custom annotation
Driver.java
package io.hamzeen;
import java.lang.annotation.Annotation;
public class Driver {
public static void main(String[] args) {
Class<TestAlpha> obj = TestAlpha.class;
if (obj.isAnnotationPresent(IssueInfo.class)) {
Annot...
What is the native keyword in Java for?
...he implementation is actually native code. It’s just “implemented in a language other than the Java programming language”.
– Holger
May 10 '19 at 10:57
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What are the disadvantages to declaring Scala case classes?
...22-parameter limit for case classes is removed in Scala 2.11. issues.scala-lang.org/browse/SI-7296
– Jonathan Crosmer
Jun 12 '15 at 15:04
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How to pass a URI to an intent?
...
got this error when putting java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Intent android.content.Intent.putExtra(java.lang.String, android.os.Parcelable)' on a null object reference
– Omar Boshra
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How do I make my string comparison case insensitive?
...erent letters, creating the lower/upper case pairs iİ and ıI while other languages treat iI as a pair and do not use the letters ı and İ. In German, the lower case ß is capitalized as "SS".
– jarnbjo
May 21 '13 at 12:24
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Load HTML file into WebView
...th BufferedReader for example
More info: WebView.loadDataWithBaseURL(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
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How to read the value of a private field from a different class in Java?
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Try FieldUtils from apache commons-lang3:
FieldUtils.readField(object, fieldName, true);
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get string value from HashMap depending on key name
...re initially, but if I do a System.out.println() I get something like java.lang.string#F0454
Sorry, I'm not too familiar with maps as you can probably guess ;)
You're seeing the outcome of Object#toString(). But the java.lang.String should already have one implemented, unless you created a cu...
How to get terminal's Character Encoding
...an determine it by looking at those variables:
echo $LC_CTYPE
or
echo $LANG
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What is a stack trace, and how can I use it to debug my application errors?
...on. Let's have a look at the stack trace:
Exception in thread "main" java.lang.NullPointerException
at com.example.myproject.Book.getTitle(Book.java:16)
at com.example.myproject.Author.getBookTitles(Author.java:25)
at com.example.myproject.Bootstrap.main(Bootstrap.java:14)
...