How to use public data member or function in other class ?

Hello,This will definitively useful for beginners.At the startating stage of developing developer should know some basic things. Like how to maintain global variable and function and use them in all necessary class to optimize code.I will show you how to maintain this kind of thing.

For that you have to create Singleton Class and learn how to use it.But before that we you should know that what is Singleton Class ?

What is Singleton Class ?

Only one instance of the class can exist. As per Google

How ClassicSingleton looks ?

Let start with creating class said ClassicSingleton.java

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01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19	public class ClassicSingleton {       private static ClassicSingleton instance = null;     public char[] name = new char[18]; // Member       protected ClassicSingleton() {         // Exists only to defeat instantiation.     }     public static ClassicSingleton getInstance() {         if (instance == null) {             instance = new ClassicSingleton();         }         return instance;     }     public String getName() {         String myName = "Chintan Khetiya";         return myName;     } }

public class ClassicSingleton {

    private static ClassicSingleton instance = null;
    public char[] name = new char[18]; // Member 

    protected ClassicSingleton() {
        // Exists only to defeat instantiation.
    }
    public static ClassicSingleton getInstance() {
        if (instance == null) {
            instance = new ClassicSingleton();
        }
        return instance;
    }
    public String getName() {
        String myName = "Chintan Khetiya";
        return myName;
    }
}

How to use function and member of the Singleton class ?

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1 2 3 4 5	ClassicSingleton CS;   CS.getInstance(); //... String myName = CS.getname(); // use function

ClassicSingleton CS;

CS.getInstance();
//...
String myName = CS.getname(); // use function