Java Expert....Java/Open Source Addict

Redes Sociales

twitterlinkedinrss feedemail youtube

lunes, 16 de agosto de 2021

Problems to Install Gradle on Mac using brew

Dear friends, 

In this post, I want to share how to fix the error about Gradle installation using brew. In my case when I  try to install Gradle, I have the following errors:

In the picture above, the suggestion was executing the commands related to git. Because as of Oct 2020 Homebrew no longer creates shallow clones and updates them. However, when I try to execute them, I had the following error:

The problem described is because for some reason the Xcode tools are missing. To continue to fix the problem about Gradle installation, you must do the following:

1. First, execute the xcode-select --install command. The pictures below show the installation process.


2.- Once time, these tools had finished. The next step is to execute the commands:

git -C "/usr/local/Homebrew/Library/Taps/homebrew/homebrew-core" fetch --unshallow

git -C /usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask fetch --unshallow


3.- Later, you must start the Gradle installation, to do this you must execute the brew install gradle command.


4.- Finally, execute the gradle -v command, to verify the installation.

viernes, 13 de agosto de 2021

Groovy Problem in Jasper Studio 6.13

Dear Friends,

In this post, I show how to fix the error related to Groovy in JasperStudio 6.13. Let me start.
I have a JEE project that has some reports that were designed using Ireport 5.0 with JasperReport 5.3. The problem was in updating the libraries and tools versions. Specifically to JasperReport 6.17 and JasperStudio 6.13, when I loaded the reports and try to compile them, I was the following error:

To fix it, we need to do this following:

 Change the Language

1.- Open the report in JasperStudio, place it in the Design mode and select the report in the outline view.


2. -  Select right-click and select the Show Properties view, in this view, you must change the language value from Groovy to Java and save it.

3. -  Finally,  compile the report.

martes, 3 de agosto de 2021

How to resolve errors related with JAXBException

Hello friends, when you have these errors related to JAXBException and you are using java version 9,10 o greater.

You can download the libraries (jars) o use Java 8. Because the JAXB API classes only are available in Java 6/7/8 but no in future Java versions. Since Java 9 they are part of the JEE API.

If you use Linux, you should make sure you use the correct version of the java. For this, you must select the version with command alternatives --config java

Later to select the version, you can use the java -version command, to verify the java version.

lunes, 2 de agosto de 2021

Install PostgreSQL on Fedora 33

 Dear friends,

In this post, I will show how to install PosgreSQL 12 on Fedora 33. To do this, we need the following.

1. Open a terminal and login with sudo user.

2. Install the postgres repository (pgdg-fedora-repo ) with the command

dnf install -y
install pgdg-fedora-repo  repository

3. Install the postgreSQL server, with the following command.

dnf install -y postgresql13-server


4. Then, we need to initialize the database and enable automatic-start, with the following commands.

/usr/pgsql-13/bin/postgresql-13-setup initdb
systemctl enable postgresql-13
systemctl start postgresql-13

5. Set the password. To do this, we need to log in with postgres user and execute the following command:

 psql -c "alter user postgres with password '<your_password>'"

6. Finally, login to database using the postgres user with the password created recently. You can use PGAdmin o Dbeaver