JAVA variable type, definition variable, java variable Type Definition

JAVA variable type, definition variable, java variable Type Definition

Common Data Types in JAVA

Data Type	Data Type description	Description
Char	Character Type	Used to store a single character, such as gender "male", "female", electric lights "on", and "off"
Int	Integer	Used to store integers, such as 24 hours a day and 31 days a month.
Double	Double Precision	Used to store decimals. For example, the price of Mengniu's breakfast milk is 1.3 yuan, and the phone's standby time is 6.5 hours.
String	String	It is used to store a string of characters, such as "My hobby is playing football" and "I like Java programs"
Boolean	Boolean Type	Only one of the two values can be assigned: true or false)

 

 

 

 

 

 

Define Variables

Public class Test {public static void main (String [] args) {char a = 'P'; // declare and assign a value to the int number = 123 variable of the character type (single character; // declare and assign the integer Variable double B = 1.5; // declare and assign the double-precision variable String d = "zifuchuan "; // declare and assign values to string variables // output System. out. println (a); System. out. println (number); System. out. println (B); System. out. println (d );}}