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Map.clear() vs new Map : Which one will be better? [duplicate]
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I thought Creating object in java more expensive in terms of memory,so it is better to you go with .clear(),so you are using same object instead of creating new one
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Any idea why I need to cast an integer literal to (int) here?
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I think it's because int is a keyword in Java, but Integer is not. Since int is a keyword, you can't use it as an identifier for a variable or a class, leaving the only possibility left for it to be a typecast. That'd explain it.
– BoltClock♦...
Android: View.setID(int id) programmatically - how to avoid ID conflicts?
...'s sample code.
samples/ApiDemos/src/com/example/android/apis/RadioGroup1.java
samples/ApiDemp/res/values/ids.xml
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Converting pixels to dp
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Preferably put in a Util.java class
public static float dpFromPx(final Context context, final float px) {
return px / context.getResources().getDisplayMetrics().density;
}
public static float pxFromDp(final Context context, final float dp)...
How to increase IDE memory limit in IntelliJ IDEA on Mac?
...lation
-XX:SoftRefLRUPolicyMSPerMB=100
-ea
-Dsun.io.useCanonCaches=false
-Djava.net.preferIPv4Stack=true
-Djdk.http.auth.tunneling.disabledSchemes=""
-XX:+HeapDumpOnOutOfMemoryError
-XX:-OmitStackTraceInFastThrow
-Xverify:none
-XX:ErrorFile=$USER_HOME/java_error_in_idea_%p.log
-XX:HeapDumpPath=$USE...
Spring boot @ResponseBody doesn't serialize entity id
....springframework.data.rest.webmvc.config.RepositoryRestConfigurer;
import javax.persistence.EntityManager;
import javax.persistence.metamodel.Type;
@Configuration
public class RestConfiguration implements RepositoryRestConfigurer {
@Autowired
private EntityManager entityManager;
@Ove...
How to find encoding of a file via script on Linux?
...ncoding detector library ported from Mozilla.
Usage:
~> uchardet file.java
UTF-8
Various Linux distributions (Debian/Ubuntu, OpenSuse-packman, ...) provide binaries.
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I want to get the type of a variable at runtime
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for readers: this is the most useful solution. As in Javascript typeof x, here manOf(x) say the data type!
– Peter Krauss
Nov 27 '19 at 21:45
add a comme...
Take a char input from the Scanner
... the OS level.
Reference:
How to read a single char from the console in Java (as the user types it)?
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`find -name` pattern that matches multiple patterns
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My default has been:
find -type f | egrep -i "*.java|*.css|*.cs|*.sql"
Like the less process intencive find execution by Brendan Long and Stephan202 et al.:
find Documents \( -name "*.py" -or -name "*.html" \)
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