大约有 8,000 项符合查询结果（耗时：0.0311秒） [XML]
JPA getSingleResult() or null
...
Try this in Java 8:
Optional first = query.getResultList().stream().findFirst();
share
|
improve this answer
|
...
Eclipse and Windows newlines
...inux just try this on a command line:
sed 's/$'"/`echo \\\r`/" yourfile.java > output.java
share
|
improve this answer
|
follow
|
...
Set margins in a LinearLayout programmatically
I'm trying to use Java ( not XML ) to create a LinearLayout with buttons that fill the screen, and have margins. Here is code that works without margins:
...
Windows batch script launch program and exit console
...
note: when you want to start a java jar file this way, make sure to use the javaw executable (not just java, because java will start another batch window): e.g. start "" "javaw" -jar C:\JavaProject\myApp.jar
– TmTron
...
Android canvas draw rectangle
...h stroke width 0 and the desired fill colour(s).
For example:
DrawView.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawView extends View {
Paint paint = new Paint()...
Generate a random double in a range
...
This question was asked before Java 7 release but now, there is another possible way using Java 7 (and above) API:
double random = ThreadLocalRandom.current().nextDouble(min, max);
nextDouble will return a pseudorandom double value between the minimum (...
Git undo changes in some files [duplicate]
...it-scm.com/book/en/Git-Basics-Undoing-Things
git checkout -- modifiedfile.java
1)$ git status
you will see the modified file
2)$git checkout -- modifiedfile.java
3)$git status
share
|
impro...
What is the maven-shade-plugin used for, and why would you want to relocate Java packages?
...* io.kuku.dependencies.com.fasterxml.jackson.@1
Run the following command:
java -jar jarjar-1.4.jar process rules.txt jackson-databind-2.6.4.jar kuku-jackson-databind-2.6.4.jar
Installing the modified JARs to the local repository
In this case I'm installing 3 files located on "c:\my-jars\" fol...
How to parameterize @Scheduled(fixedDelay) with Spring 3.0 expression language?
...sk:scheduled ref="someObject" method="readLog"
fixed-rate="#{T(java.lang.Long).valueOf(YourConfigurationBean.stringValue)}"/>
</task:scheduled-tasks>
Again, I haven't tried any of these setups, but I hope it might help you a bit.
...
Remove large .pack file created by git
...ng files from history
Download BFG from their website. Make sure you have java installed, then create a mirror clone and purge history. Make sure to replace YOUR_FILE_NAME with the name of the file you'd like to delete:
git clone --mirror git://example.com/some-big-repo.git
java -jar bfg.jar --del...