Java Learning Made Easy

attention@computerscienceexpertise.com PDF created with pdfFactory Pro trial version www.pdffactory.com

Programming Instructions In JAVA

Output Statements:

The println( ) method or the function is used to display information on the screen. It also provides a line feed i.e. transfers the control to the next line of the output.

// Example program to utilize println( ) method class output

{ public void display()

{int a=10;

int b=20;

int c=30;

int d=40;

System.out.println("The usage of println( ) method"); System.out.println("The value of a is "+a); System.out.println("The value of b is "+b); System.out.println("The value of c is "+c); System.out.println("The value of d is "+d);

}}

attention@computerscienceexpertise.com PDF created with pdfFactory Pro trial version www.pdffactory.com

Remark Statement of JAVA

The Java language offers provision of remark within its program in the following three ways :

(i). Using /* and */

eg. /* This program prints the sum of two numbers */ (ii). Using // for a single line of comment.

eg. // This program prints the sum of two numbers (iii). Using /** and */

eg. /** This program prints the sum of two numbers */

attention@computerscienceexpertise.com PDF created with pdfFactory Pro trial version www.pdffactory.com

Data Types (int)

Type Size Min. Range Max.Range byte One Byte -128

127

short Two Bytes -32,768

32,767

Four Bytes -2,147,483,648

To

2,147,483,647

long Eight Bytes -9,223,372,036,854,775,808 To 9,223,372,036,854,775,807

attention@computerscienceexpertise.com PDF created with pdfFactory Pro trial version www.pdffactory.com

Data Types (float)

This type of data includes numbers with decimal part or fractional numbers. It is further classified into two types as float and double with references as : Type

Size

Min. Range

Max. Range

float

4

3.4e-038 to

3.4e+038

double

8

1.7e-308 to

1.7e+308

attention@computerscienceexpertise.com PDF created with pdfFactory Pro trial version www.pdffactory.com

Escape Sequences in JAVA

Escape

Meaning

Newline

\t

Tab

\b

Backspace