Step 2: Compile with javac

Use below command to compile the java code,

javac -d classes/ src/com/marakana/jniexamples/Hello.java

and the directory tree is like below.

├── classes
│   └── com
│       └── marakana
│           └── jniexamples
│               └── Hello.class
└── src
    └── com
        └── marakana
            └── jniexamples
                └── Hello.java