java.lang.IllegalMonitorStateException: unlock of unowned monitor at java.util.Random.nextGaussian(Random.java:187)


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While calling inbuilt method nextGaussian throws an IllegalMonitorStateException: unlock of unowned monitor


double dispersion = RAND.nextGaussian() * 0.2;

which is inside


@Override
public void stroke(Canvas c, float x, float y) {
}

which is called here


case MotionEvent.ACTION_MOVE:
style.stroke(mCanvas, x, y);
break;
}
return true;
}

then in Surface.java


@Override
publi

Related to : java.lang.IllegalMonitorStateException: unlock of unowned monitor at java.util.Random.nextGaussian(Random.java:187)
incompatible types - found java.util.Iterator(Lot) but expected java.util.Iterator (java.lang.String)
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I'm currently having a problem to iterate over a collection. When I declare the fields and constructor and try to enter my method to iterate over the collection and print out the elements, it comes up with the following error.


incompatible types - found java.util.Iterator(Lot) but expected java.util.Iterator (java.lang.String)


Here is my code.


public class Auction
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I have a jrxml file. When I run that file in IReport Designer 4.8.0, Produces report without fail.
But when I deploy the same file in JasperServer 5.0.0, it throws exception.


The server has encountered an error. Please excuse the inconvenience.
Error Message
java.lang.ClassCastException: java.util.Date cannot be cast to java.sql.Timestamp
Error Trace
java.lang.ClassCastException: java.util.Date cannot be cast to java.sql.Timestamp at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.setTimestamp(JRJdbcQueryExecuter.java:605) at
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Why may this happen? The thing is that monitor object is not null for sure, but still we get this exception quite often:


java.lang.IllegalMonitorStateException: (m=null) Failed to get monitor for (tIdx=60)
at java.lang.Object.wait(Object.java:474)
at ...

The code that provokes this is a simple pool solution:


public Object takeObject() {
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java.lang.IllegalMonitorStateException: unlock of unowned monitor at java.util.Random.nextGaussian(Random.java:187)
Java

While calling inbuilt method nextGaussian throws an IllegalMonitorStateException: unlock of unowned monitor


double dispersion = RAND.nextGaussian() * 0.2;

which is inside


@Override
public void stroke(Canvas c, float x, float y) {
}

which is called here


case MotionEvent.ACTION_MOVE:
style.stroke(mCanvas, x, y);
break;
}
return true;
}

then in Surface.java


@Override
publi
Exception in thread “Thread-8” java.lang.StackOverflowError…at java.util.Random.nextInt(Unknown Source)
Java
Exception in thread "Thread-8" java.lang.StackOverflowError
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I'm working with a multi threaded application(Ant Simulation Colony) where I created every ant as a thread and when tens of threads (ants) are running, above exception occurs after every few turns and thread is killed. code where I'm using Random() is;


Random r
Gradle - Execution failed for task 'sonarAnalyze' - java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.lang.String
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I have this error when running sonar with my gradle build script.


gradle sonarAnalyze


15:41:02.931 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
15:41:02.931 [ERROR] [org.gradle.BuildExceptionReporter]
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