Importing packages in Java

Question

How to import a method from a package into another program? I don't know how to import... I write a lil' code:

package Dan;
public class Vik
{
    public void disp()
    {
        System.out.println("Heyya!");
    }
}

and then, saved it in a folder named "Dan" and I compiled it. The .class file is generated. Then, I wrote this code below:

import Dan.Vik.disp;
class Kab
{
    public static void main(String args[])
    {
        Vik Sam = new Vik();
        Sam.disp();
    }
}

and I saved it outside the folder "Dan" and it says : "cannot find symbol"

I saved the first code in C:\Dan\Vik.java and the second in C:\Kab.java

If you use an IDE, it will add the `import` statements for you automatically. — Peter Lawrey, Sep 03 '12 at 13:34
Why are you minusing the guy? Well he is a trully beginner, but the question is valid. — Petar Minchev, Sep 03 '12 at 13:37

score 19 · Accepted Answer · answered Sep 03 '12 at 13:36

You don't import methods in Java, only types:

import Dan.Vik;
class Kab
{
    public static void main(String args[])
    {
        Vik Sam = new Vik();
        Sam.disp();
    }
}

The exception is so-called "static imports", which let you import class (static) methods from other types.

Pshemo · Answer 2 · 2023-01-16T14:48:13.467

In Java you can only import non-primitive types, or static methods/fields.

To import types use import full.package.name.of.TypeName;

//example
import java.util.List; //to import List interface

to import static methods/fields use

import static full.package.name.of.TypeName.staticMethod;
import static full.package.name.of.TypeName.staticField;

//example
import static java.lang.Math.max; //to import max method(s)
import static java.lang.Math.PI; //to import PI field

score 8 · Answer 3 · answered Sep 03 '12 at 13:36

8

Take out the method name from in your import statement. e.g.

import Dan.Vik.disp;

becomes:

import Dan.Vik;

answered Sep 03 '12 at 13:36

Chris B

925
4
14

score 2 · Answer 4 · edited Sep 03 '12 at 13:43

2

You should use

import Dan.Vik;

This makes the class visible and the its public methods available.

edited Sep 03 '12 at 13:43

MvG

57,380
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answered Sep 03 '12 at 13:36

ncmathsadist

4,684
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Apurv · Answer 5 · 2020-06-03T15:36:47.050

2

Here is the right way to do imports in Java.

import Dan.Vik;
class Kab
{
public static void main(String args[])
{
    Vik Sam = new Vik();
    Sam.disp();
}
}

You don't import methods in java. There is an advanced usage of static imports but basically you just import packages and classes. If the function you are importing is a static function you can do a static import, but I don't think you are looking for static imports here.

edited Jun 03 '20 at 15:36

answered Sep 03 '12 at 13:38

Apurv

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9

No no no no, Apurv, that's not the way to format your code in Java. – brimborium Sep 03 '12 at 13:43
What's the hysteria "No no no no" about? – Hejazzman Feb 06 '19 at 15:50

score 1 · Answer 6 · answered Feb 26 '17 at 03:49

In Java you can only import class Names, or static methods/fields.

To import class use

import full.package.name.of.SomeClass;

We can also import static methods/fields in Java and this is how to import

import static full.package.nameOfClass.staticMethod;
import static full.package.nameOfClass.staticField;

score 0 · Answer 7 · answered Sep 03 '12 at 13:37

0

For the second class file, add "package Dan;" like the first one, so as to make sure they are in the same package; modify "import Dan.Vik.disp;" to be "import Dan.Vik;"

answered Sep 03 '12 at 13:37

CyberPlayerOne

3,078
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Importing packages in Java

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