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How do I get the size of a java.sql.ResultSet?
...
if(rs.last()){
rowCount = rs.getRow();
rs.beforeFirst();
}
:
java.sql.SQLException: Invalid operation for forward only resultset
it's due to by default it is ResultSet.TYPE_FORWARD_ONLY, which means you can only use rs.next()
the solution is:
stmt=conn.createStatement(ResultSet.TYP...
How to see if an object is an array without using reflection?
How can I see in Java if an Object is an array without using reflection?
And how can I iterate through all items without using reflection?
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How to print color in console using System.out.println?
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Here are a list of colors in a Java class with public static fields
Usage
System.out.println(ConsoleColors.RED + "RED COLORED" +
ConsoleColors.RESET + " NORMAL");
Note
Don't forget to use the RESET after printing as the effect will remain if it's not...
Keyboard shortcut to change font size in Eclipse?
...worked for me on some files but not on the ones I cared about: .scala and .java files. The problem turned out to be that eclipse-fonts appears to affect only the "Text Font" setting rather than being aware of the font setting used in the current window. If you have changed the "Java Editor Text Fo...
Regex doesn't work in String.matches()
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Welcome to Java's misnamed .matches() method... It tries and matches ALL the input. Unfortunately, other languages have followed suit :(
If you want to see if the regex matches an input text, use a Pattern, a Matcher and the .find() me...
Embedded MongoDB when running integration tests
...bution.Version;
import de.flapdoodle.embed.process.runtime.Network;
import java.util.Date;
import org.junit.After;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class EmbeddedMongoTest
{
private static final String DATABASE_NAME = "embedded";
priv...
Differences between Agda and Idris
... into dependently-typed programming and have found that the Agda and Idris languages are the closest to Haskell, so I started there.
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Can you organize imports for an entire project in eclipse with a keystroke?
...e nice to just do a keystroke and have eclipse organize all imports in all java classes instead of just the one you are looking at? Is this possible? Is there a keystroke for it?
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How to add elements of a Java8 stream into an existing List
Javadoc of Collector shows how to collect elements of a stream into a new List. Is there an one-liner that adds the results into an existing ArrayList?
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Can't compile project when I'm using Lombok under IntelliJ IDEA
...load
Download the JAR file into the project lib directory (e.g., $HOME/dev/java/project/libs).
Start the IDE.
Click File ???? Settings.
Expand Build, Execution, Deployment ???? Compiler ???? Annotation Processors.
Ensure Enable annotation processing is checked.
Ensure Store generates sources relativ...