大约有 9,000 项符合查询结果（耗时：0.0295秒） [XML]
JPA getSingleResult() or null
...
Try this in Java 8:
Optional first = query.getResultList().stream().findFirst();
share
|
improve this answer
|
...
【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...
...*60页
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:
...
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
...
Eclipse and Windows newlines
...inux just try this on a command line:
sed 's/$'"/`echo \\\r`/" yourfile.java > output.java
share
|
improve this answer
|
follow
|
...
Android canvas draw rectangle
...h stroke width 0 and the desired fill colour(s).
For example:
DrawView.java
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;
public class DrawView extends View {
Paint paint = new Paint()...
Git undo changes in some files [duplicate]
...it-scm.com/book/en/Git-Basics-Undoing-Things
git checkout -- modifiedfile.java
1)$ git status
you will see the modified file
2)$git checkout -- modifiedfile.java
3)$git status
share
|
impro...
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 (...
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...
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...