Follow bellow steps to run java programs in Notepad++:-

 👉step1: Install Notepad++ and install NppExec plugin in Notepad++

 👉step2: set Java Home as system environment variable 

👉step3: Write path of java file:

      cd d:Programs/Java Programs

 👉step4: Write Run command:

               javac program.java
               java program

👉step4: Output:

javac program.java
Process started (PID=10124) >>>
<<< Process finished (PID=10124). (Exit code 0)
java program
Process started (PID=3828) >>>
Hello World  (output)
<<< Process finished (PID=3828). (Exit code 0)
================ READY ================