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//Run this line to compile
javac programName.java
//Run this line to run
java programName
run java file on the command prompt
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javac filename.java // compile the file
//if compile successfull
java filename
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java -jar target/spring-cloud-gateway-keycloak-oauth2-0.0.1-SNAPSHOT.jar
java -jar target/product-service-0.0.1-SNAPSHOT.jar