how to execute java file code example

Example 1: run java file

javac hello.java

Example 2: cmd java compile

javac MyFisrtProgam.java // enter to compile 
  java MyfirstProgram // run program

Example 3: compile java

// compile
> javac myCode.java
// run
> java myCode

Example 4: java run project from command line

// Assuming that you have an executable jar
java -jar myJavaProject.jar

// Assuming that you have packaged jar
java -jar target/myJavaProject.jar