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Turning Sonar off for certain code
...onar correctly interprets @SuppressFBWarnings (added to avoid clashes with java.lang.SuppressWarnings) and also ignores it.
– Marcel Stör
Jul 17 '13 at 6:39
...
Convert JsonNode into POJO
...he official documentation for that call: http://jackson.codehaus.org/1.7.9/javadoc/org/codehaus/jackson/map/ObjectMapper.html#readValue(java.lang.String, java.lang.Class)
You can also define a custom deserializer when you instantiate the ObjectMapper:
http://wiki.fasterxml.com/JacksonHowToCustomDes...
How do I center text horizontally and vertically in a TextView?
...er_horizontal according to your need.
and as @stealthcopter commented
in java: .setGravity(Gravity.CENTER);
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How to check if a line is blank using regex
...es) by trim()-ing it, then checking if the resulting string isEmpty().
In Java, this would be something like this:
if (line.trim().isEmpty()) {
// line is "blank"
}
The regex solution can also be simplified without anchors (because of how matches is defined in Java) as follows:
if (line.mat...
How to remove newlines from beginning and end of a string?
...g::trim method has a strange definition of whitespace.
As discussed here, Java 11 adds new strip… methods to the String class. These use a more Unicode-savvy definition of whitespace. See the rules of this definition in the class JavaDoc for Character::isWhitespace.
Example code.
String input =...
JPA getSingleResult() or null
...
Try this in Java 8:
Optional first = query.getResultList().stream().findFirst();
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Eclipse and Windows newlines
...inux just try this on a command line:
sed 's/$'"/`echo \\\r`/" yourfile.java > output.java
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Set margins in a LinearLayout programmatically
I'm trying to use Java ( not XML ) to create a LinearLayout with buttons that fill the screen, and have margins. Here is code that works without margins:
...
Windows batch script launch program and exit console
...
note: when you want to start a java jar file this way, make sure to use the javaw executable (not just java, because java will start another batch window): e.g. start "" "javaw" -jar C:\JavaProject\myApp.jar
– TmTron
...
Android canvas draw rectangle
...h stroke width 0 and the desired fill colour(s).
For example:
DrawView.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawView extends View {
Paint paint = new Paint()...