How to compile packages in java?

Question

I have written a simple package program:

---

  //A simple package

       package MyPack


       class Balance
       {
        String name;
        doubl         


        

Answer 1

Try to create the folder named MyPack and move .class files in it or use following command line to compile the java code and it moves the .class files into MyPack folder.

javac YourFileName.java -d .

and run using,

java MyPack.AccountBalance

Have a look at javac tool

From the tool doc : By default, the compiler puts each class file in the same directory as its source file. You can specify a separate destination directory with -d (see Options, below).

and package tutorial.

Answer 2

Best is to compile and run the classes from outside the packages :

First you compile with javac :

$javac MyPack/AccountBalance.java

this will create a new file in the MyPack folder called AccountBalance.class

then you can run it :

$java MyPack.AccountBalance

By the way: it is discouraged to have package names start with a capital.

Answer 3

When you are trying to compile the java class, use the '-d' option (destination) to specify where the .class files should be located.

javac -d "classes" AccountBalance.java

and when you run your program, make sure that same folder is included in your class path:

java -classpath "classes" MyPack.AccountBalance

Answer 4

If you're frequently compiling and running via javac and java commands then use

javac MyJavaClass.java && java MyJavaClass

This'll compile the the class then run the class you just compiled.

Note: Replace && with ; if using Windows powershell.