Commands for building java application

javacmd.txt

vi ~/.bash_profile
vi /Users/vinkrish/.bash_profile

export JAVA_HOME=$(/usr/libexec/java_home)
source ~/.bash_profile

echo $JAVA_HOME
/usr/local/Cellar/openjdk/17.0.2/libexec/openjdk.jdk/Contents/Home

earlier JAVA_HOME:
Library/Java/JavaVirtualMachines/jdk1.8.0_221.jdk/Contents/Home

javac -version

javac FileName.java
java FileName

jar cf jarName.jar fileName.class

// using spring_sample project in workspace
java -cp target/spring_sample-0.0.1-SNAPSHOT.jar info.vinkrish.Application
java -jar target/spring_sample-0.0.1-SNAPSHOT.jar

java -jar lombok-1.18.22.jar
// using lombok
javac -cp lombok.jar Student.java
javap Student.class
// if using -vm to start eclipse
-vmargs -javaagent:lombok.jar

java -jar --add-opens java.base/java.lang=ALL-UNNAMED app.jar
// If you are running in IDEA, you need to configure the corresponding VM parameters
--add-opens java.base/java.lang=ALL-UNNAMED

// see the bytecode of the class
javap -c Point.class

To run java file inside jar file:
java -classpath jarName.jar fileName
javac -classpath ./lib/* fileName.java
java -classpath ./lib/*:./ fileName

The classpath is simply the location, or set of locations where class files can be found, that your program might need to use. The classpath includes folders, JARs, and (in certain more complex setups) other sources of classfiles.

When Java needs to load a class, it looks on the classpath for it. The default classpath is the set of Jars that contain Java's built-in classes, combined with the current directory of your shell prompt.

java -classpath /Users/vinkrish/Workspace/java/MyClasses;/Users/vinkrish/Workspace/java/OtherClasses

jar files are like zip files:
unzip jarName.jar

mvn --version
mvn clean
mvn package
mvn clean package
mvn clean verify -DskipTests
mvn clean verify -DskipITs

mvn dependency:tree
./mvnw --version