Basic variables defined as Java objects: Types such as String, Integer, Double, Object, Long, Float, Boolean, Character, Vector

String:

String variable is used for text printing. object type is variable. It is an object type defined in java using char variable type.

String name = "Bill";

String surname = "Gates";

String namesurname;

namesurname = name + " " + surname ;

System.out.println (namesurname);

output: Bill Gates

or

String name = new String ("Bill");

String surname = new String ("Gates");

String namesurname = new String ();

namesurname = name + " " + lastname;

System.out.println (namesurname);

output: Bill Gates

 

Integer:

Integer i;

i=new Integer(3);

veya Integer i=new Integer(3);

Convert string to int

String s="15";

Int x=Integer.parseInt(s);

Convert integer value to string

int x=3;

String s=Integer.toString(x);

 

Double:

Double x;

x=new Double(3.66e5)

veya

Double x=new Double(3.66e5)

Convert String to Double

String s="15.66e-3";

Double x=new Double(s);

Convert Double value to double value

double x;

Double y=new Double(15.66e-3);

x=Double.doubleValue(y);

Convert a Double value to an int value

int x;

Double y=new Double(15.66e-3);

x=Double.intValue(y);