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How find all unused classes in Intellij Idea?
...ar"
Double-click on "Unused declaration"
Settings will pop up
Click on Java/Declaration redundancy/Unused declaration
on the right bottom select "On the fly editor settings"
untick check fields, ..., check parameters. Only Check Classes should be ticked.
Press OK
Settings closes
On the menu ...
How to solve javax.net.ssl.SSLHandshakeException Error?
...ificate saved in a file, you need to add it to your JVM's trust store. At $JAVA_HOME/jre/lib/security/ for JREs or $JAVA_HOME/lib/security for JDKs, there's a file named cacerts, which comes with Java and contains the public certificates of the well-known Certifying Authorities. To import the new ce...
Immutable class?
How can one make a Java class immutable, what is the need of immutability and is there any advantage to using this?
13 Answ...
Do fragments really need an empty constructor?
...k: https://android.googlesource.com/platform/frameworks/base/+/master/core/java/android/app/Fragment.java
You will see the instantiate(..) method in the Fragment class calls the newInstance method:
public static Fragment instantiate(Context context, String fname, @Nullable Bundle args) {
try {...
Converting BigDecimal to Integer
...red Oct 28 '10 at 14:01
willcodejavaforfoodwillcodejavaforfood
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What is the purpose of flush() in Java streams?
In Java, flush() method is used in streams. But I don't understand what are all the purpose of using this method?
6 Answe...
Convert int to char in java
...ted by the value of 48.
We typed (a + '0') and in order to add these up, Java converted '0' to its ASCII value which is 48 and a is 1 so the sum is 49. Then what we did is:
(char)(49)
We casted int to char. ASCII equivalent of 49 is '1'. You can convert any digit to char this way and is smarter...
What does “atomic” mean in programming?
In the Effective Java book, it states:
6 Answers
6
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How to initialize log4j properly?
...(Look for the "Default Initialization Procedure" section).
For example:
java -Dlog4j.configuration=customName ....
Will cause log4j to look for a file called customName on the classpath.
If you are having problems I find it helpful to turn on the log4j.debug:
-Dlog4j.debug
It will print to ...
Handler is abstract ,cannot be instantiated
...
It seems you have imported a wrong Handler class
import java.util.logging.Handler;
Change it to
import android.os.Handler;
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