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How to compile packages in Java
Let us look at an example that creates a package called animals. It is a good practice to use names of packages with lower case letters to avoid any conflicts with the names of classes and interfaces.
Following package example contains interface named animals −
/* File name : Animal.java */ package animals; interface Animal { public void eat(); public void travel(); }
Now, let us implement the above interface in the same package animals −
package animals; /* File name : MammalInt.java */ public class MammalInt implements Animal { public void eat() { System.out.println("Mammal eats"); } public void travel() { System.out.println("Mammal travels"); } public int noOfLegs() { return 0; } public static void main(String args[]) { MammalInt m = new MammalInt(); m.eat(); m.travel(); } }
Now compile the java files as shown below −
$ javac -d . Animal.java $ javac -d . MammalInt.java
Now a package/folder with the name animals will be created in the current directory and these class files will be placed in it as shown below.
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