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What is the use of printStackTrace() method in Java?
...n it, printStackTrace is called on the IOException object in the catch block.
What does printStackTrace() actually do?
...
Can an int be null in Java?
...ck() is declared to return int, it can never be null and the whole if-else block is then superfluous.
int data = check(Node root);
// do something
Autoboxing problems doesn't apply here as well when check() is declared to return int. If it had returned Integer, then you may risk NullPointerExcep...
With Spring can I make an optional path variable?
...
Spring 5 / Spring Boot 2 examples:
blocking
@GetMapping({"/dto-blocking/{type}", "/dto-blocking"})
public ResponseEntity<Dto> getDtoBlocking(
@PathVariable(name = "type", required = false) String type) {
if (StringUtils.isEmpty(type)) {
...
Ruby class instance variable vs. class variable
...:doll
joey.shared_things << :puzzle
suzy.shared_things << :blocks
p Parent.family_things #=> [:house, :vacuum]
p Child.family_things #=> [:house, :vacuum]
p papa.family_things #=> [:house, :vacuum]
p mama.family_things #=> [:house, :vacuum]
p joey.family_things #=...
How to vertically align into the center of the content of a div with defined width/height?
...tical-align:middle;
}
Live DEMO
Version 2: Parent div with display block and content display table-cell
.area{
height: 100px;
width: 100px;
background: red;
margin:10px;
text-align: center;
display:block;
}
.content {
height: 100px;
width: 100px;
display...
How to overlay images
...pic{
width:140px;
text-decoration:none;
position:relative;
display:block;
border:1px solid #666;
padding:3px;
margin-right:5px;
float:left;
}
a.gallerypic span.zoom-icon{
visibility:hidden;
position:absolute;
left:40%;
top:35%;
filter:alpha(opacity=50);
-moz-opacity:0.5;...
Having links relative to root?
...tml#h-12.4.
Suggested reading:
http://www.motive.co.nz/glossary/linking.php
http://www.communitymx.com/content/article.cfm?cid=AEDCC52C4AD230AD
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OnItemCLickListener not working in listview
...k.
The row item must have a param like
android:descendantFocusability = "blocksDescendants".
Here you can see an example of how your list item should look like.
Your list item xml should be...
row_item.xml (your_xml_file.xml)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/and...
How can I propagate exceptions between threads?
... way to "stop caring about" a std::future; even its destructor will simply block until the task is done. [EDIT, 2017: The blocking-destructor behavior is a misfeature only of the pseudo-futures returned from std::async, which you should never use anyway. Normal futures don't block in their destructo...
API to automatically upload apk to Google Play? [closed]
...ugin to your android application project you can configure it via the play block", Where I need to add play block?
– Aqib Mumtaz
Jul 15 '15 at 20:54
...