Java boolean Example
/*
Java boolean Example
This Java Example shows how to declare and use Java primitive boolean variable
inside a java class.
*/
public class JavaBooleanExample {
public static void main(String[] args) {
/*
* boolean is simple Java type which can have only of two values; true or false.
* All rational expressions retrun this type of value.
*
* Declare boolean varibale as below
*
* boolean <variable name> = <default value>;
*
* here assigning default value is optional.
*/
boolean b1 = true;
boolean b2 = false;
boolean b3 = (10 > 2)? true:false;
System.out.println("Value of boolean variable b1 is :" + b1);
System.out.println("Value of boolean variable b2 is :" + b2);
System.out.println("Value of boolean variable b3 is :" + b3);
}
}
/*
Output would be
Value of boolean variable b1 is :true
Value of boolean variable b2 is :false
Value of boolean variable b3 is :true
*/
Java byte Example
/*
Java byte Example
This Java Example shows how to declare and use Java primitive byte variable
inside a java class.
*/
public class JavaByteExample {
public static void main(String[] args) {
/*
* byte is smallest Java integer type.
* byte is 8 bit signed type ranges from –128 to 127.
* byte is mostly used when dealing with raw data like reading a
* binary file.
*
* Declare byte varibale as below
*
* byte <variable name> = <default value>;
*
* here assigning default value is optional.
*/
byte b1 = 100;
byte b2 = 20;
System.out.println("Value of byte variable b1 is :" + b1);
System.out.println("Value of byte variable b1 is :" + b2);
}
}
/*
Output would be
Value of byte variable b1 is :100
Value of byte variable b1 is :20
*/
Java char Example
/*
Java char Example
This Java Example shows how to declare and use Java primitive char variable
inside a java class.
*/
public class JavaCharExample {
public static void main(String[] args) {
/*
* char is 16 bit type and used to represent Unicode characters.
* Range of char is 0 to 65,536.
*
* Declare char varibale as below
*
* char <variable name> = <default value>;
*
* here assigning default value is optional.
*/
char ch1 = 'a';
char ch2 = 65; /* ASCII code of 'A'*/
System.out.println("Value of char variable ch1 is :" + ch1);
System.out.println("Value of char variable ch2 is :" + ch2);
}
}
/*
Output would be
Value of char variable ch1 is :a
Value of char variable ch2 is :A
*/
Java double Example
/*
Java double Example
This Java Example shows how to declare and use Java primitive double variable
inside a java class.
*/
public class JavaDoubleExample {
public static void main(String[] args) {
/*
* double is 64 bit double precision type and used when fractional precision
* calculation is required.
*
* Declare double varibale as below
*
* double <variable name> = <default value>;
*
* here assigning default value is optional.
*/
double d = 1232.44;
System.out.println("Value of double variable d is :" + d);
}
}
/*
Output would be
Value of double variable f is :1232.44
*/
Java int Example
/*
Java int Example
This Java Example shows how to declare and use Java primitive int variable
inside a java class.
*/
public class JavaIntExamples {
public static void main(String[] args) {
/*
* int is 32 bit signed type ranges from –2,147,483,648
* to 2,147,483,647. int is also most commonly used integer
* type in Java.
* Declare int varibale as below
*
* int <variable name> = <default value>;
*
* here assigning default value is optional.
*/
int i = 0;
int j = 100;
System.out.println("Value of int variable i is :" + i);
System.out.println("Value of int variable j is :" + j);
}
}
/*
Output would be
Value of int variable i is :0
Value of int variable j is :100
*/
Java long Example
/*
Java long Example
This Java Example shows how to declare and use Java primitive long variable
inside a java class.
*/
import java.util.*;
public class JavaLongExample {
public static void main(String[] args) {
/*
* long is 64 bit signed type and used when int is not large
* enough to hold the value.
*
* Declare long varibale as below
*
* long <variable name> = <default value>;
*
* here assigning default value is optional.
*/
long timeInMilliseconds = new Date().getTime();
System.out.println("Time in milliseconds is : " + timeInMilliseconds);
}
}
/*
Output would be
Time in milliseconds is : 1226836372234
*/
Java short Example
/*
Java short Example
This Java Example shows how to declare and use Java primitive short variable
inside a java class.
*/
public class JavaShortExample {
public static void main(String[] args) {
/*
* short is 16 bit signed type ranges from –32,768 to 32,767.
*
* Declare short varibale as below
*
* short <variable name> = <default value>;
*
* here assigning default value is optional.
*/
short s1 = 50;
short s2 = 42;
System.out.println("Value of short variable b1 is :" + s1);
System.out.println("Value of short variable b1 is :" + s2);
}
}
/*
Output would be
Value of short variable b1 is :50
Value of short variable b1 is :42
*/
