Using static import, can I import the static members of classes in Java that I create?

Question

How can I create encrypted QR code using java code and make that code readable by any QR code reader without displaying actual information.

Answer 1

Description:

In general, any class from same package can be called without importing it. Incase, if the class is not part of the same package, we need to provide the import statement to access the class. We can access any static fields or methods with reference to the class name. Here comes the use of static imports. Static imports allow us to import all static fields and methods into a class and you can access them without class name reference.

The syntax for static imports are given below:

Code:

package com.java2novice.staticimport;
// To access all static members of a class
import static package-name.class-name.*;
//To access specific static variable of a class
import static package-name.class-name.static-variable;
//To access specific static method of a class
import static package-name.class-name.static-method;

Static Import Example:

Here we have two classes. The class MyStaticMembClass has one static variable and one static method. And anther class MyStaticImportExmp imports these two static members.

MyStaticMembClass.java

package com.java2novice.stat.imp.pac1;

public class MyStaticMembClass {

    public static final int INCREMENT = 2;

    public static int incrementNumber(int number){
        return number+INCREMENT;
    }
}

MyStaticImportExmp.java

package com.java2novice.stat.imp.pac2;

import static com.java2novice.stat.imp.pac1.MyStaticMembClass.*;

public class MyStaticImportExmp {

    public static void main(String a[]){
        System.out.println("Increment value: "+INCREMENT);
        int count = 10;
        System.out.println("Increment count: "+incrementNumber(count));
        System.out.println("Increment count: "+incrementNumber(count));
    }
}

Output:

Increment value: 2
Increment count: 12
Increment count: 12