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What does Serializable mean?
What exactly does it mean for a class to be Serializable in Java? Or in general, for that matter...
10 Answers
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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
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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...
JPA getSingleResult() or null
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Try this in Java 8:
Optional first = query.getResultList().stream().findFirst();
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【软著】软件著作权证书申请流程及注意事项，模板分享 - App Inventor 2 中...
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6、AppInventor2如何申请软著？
一般的软件比如使用Java开发，源码中准备的就是.java代码，但是appinventor没有具体的代码怎么办？不要紧，将.aia导出后，用压缩软件打开aia源码，在src目录下有几个真正的源码文件，记事本打...
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:
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Windows batch script launch program and exit console
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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
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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()...
Eclipse and Windows newlines
...inux just try this on a command line:
sed 's/$'"/`echo \\\r`/" yourfile.java > output.java
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Git undo changes in some files [duplicate]
...it-scm.com/book/en/Git-Basics-Undoing-Things
git checkout -- modifiedfile.java
1)$ git status
you will see the modified file
2)$git checkout -- modifiedfile.java
3)$git status
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