Creating object for class and accessing methods of class. Various forms of Object

- Delcare object at class level:
See in order to use the object created in main method in all other methods in the same class, we need to declare object as class instance.

       Note: if you dont declare object at class level, then we cannot use it in multiple methods.

    public class DemoQAsitetesting {

private static WebDriver webDriverobj;  //declared object

public static void main(String[] args) {

webDriverobj = new FirefoxDriver(); //WebDriver webDriverobj=new FirefoxDriver();  ...if we declare this we were not able to use object webDriverobj in other methods.

}

public void registration(){
     
webDriverobj.get("http://www.demoqa.com");
          }


-
//Creating object for class and accessing methods of class

package javaFAQsolutions;

public class objectsandmethods {

    String empname="Sreekanth1";
    int empsal;
   
   
    public static void main(String arg[]){
       
        objectsandmethods obj1 = new objectsandmethods();

        obj1.fetch(); //obj1 is nothing but a copy of class, so should be able to access its methods
        obj1.getEmpName();
    }
    private void fetch(){
        String empname="Sreekanth";
        System.out.println(empname);
           
    }
   
   
    public void getEmpName(){
        objectsandmethods obj2=new objectsandmethods();
        System.out.println(obj2.empname);
        //System.out.println(obj1.empname);
       
    }
}

12/22/2015:

See how object is being used:

Source: http://docs.oracle.com/javase/tutorial/java/data/characters.html

Most of the time, if you are using a single character value, you will use the primitive char type. For example:

char ch = 'a'; 
// Unicode for uppercase Greek omega character
char uniChar = '\u03A9';
// an array of chars
char[] charArray = { 'a', 'b', 'c', 'd', 'e' };

There are times, however, when you need to use a char as an object—for example, as a method argument where an object is expected. The Java programming language provides a wrapper class that "wraps" the char in a Character object for this purpose. An object of type Charactercontains a single field, whose type is char. This Character class also offers a number of useful class (i.e., static) methods for manipulating characters.

You can create a Character object with the Character constructor:

Character ch = new Character('a');