NON PRIMITIVE DATA TYPE

 

PRIMITIVE DATA TYPES- INTEGER

The usage of ‘int’ data type to store a number is discussed in the previous section. Now, let us see how to declare an integer using data types like long, byte and short.

For using ‘long’ data type, the number should end with either ‘l’ or ‘L’. Each variable should be allocated with different names, else the system will be confused.

Java program in JDK15

        class primitive{
            public static void main(String args[]){
            byte number_1=11;
            short number_2=1129;
            int number_3=211211211;
            long number_4=1129112911291129L;
            long number_5=1129112911291129l;
            System.out.println(number_1);
            System.out.println(number_2);
            System.out.println(number_3);
            System.out.println(number_4);
            System.out.println(number_5);
            }
        }

 

Output

Variables should never start with a number eg) int 2var=10 results in error whereas using int var2=10 is correct.

PRIMITIVE DATA TYPES- FLOATING POINT

Floating values should end with either ‘F’ or ‘f’ whereas, double does not require ending with any alphabets.

Java program for floating point numbers

        class primitive{

            public static void main(String args[]){

            float number_1=11.29F;

            float number_2=11f;

            double number_3=21121.1129;

            double number_4=112911;

            System.out.println(number_1);

            System.out.println(number_2);

            System.out.println(number_3);

            System.out.println(number_4);

                }

            }

Output

In number 2, I had not defined any numbers after the decimal. Hence, it is assigned as 0. The same case occurs in double data type.

NON-NUMERIC PRIMITIVE DATA TYPE

‘Char’ data type should be always declared within single codes else it results in error. The keywords are case sensitive and hence must be used properly to avoid errors. ‘System.out.print’ outputs the variables in a same line whereas, ‘System.out.println’ outputs the elements in the next line. The shortcut for using ‘System.out.println’ is sout+Tab and this keyword is useful since this line is printed often in Java. To type strings, double codes are used.

Java program to print non-primitive data type

        class primitive{

            public static void main(String args[]){

            char a_1='x';

            char a_2='o';

            char a_3='x';

            char a_4='o';

            boolean a_5=true;

            boolean a_6=false;

            System.out.print(a_1);

            System.out.print(a_2);

            System.out.print(a_3);

            System.out.println(a_4);

            System.out.println(a_5);

            System.out.println(a_6);

                }

            }

Output

Boolean command is used for displaying only true or false and it is extensively used in many applications.

Executing code in Online compiler

I have used this link to execute the Java code: ONLINE COMPILER

You can also try using this or any other online Java complier.

Output

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