Java Section No. 09 assignment and initialization

2016-06-28

1 Assigning values
Assignment: is assigning a value to a variable or changing the value of a variable.
int speed=30;
variable=expression;//variable-type variable name = Expression

 Packageday09; Public classTest { Public Static voidMain (string[] args) {//declaring Variables        intspeed,salary; floattime,basicsalary,prize,distance; Charalphabet; //assigning values to variablesAlphabet= ' a '; Basicsalary=3094.5f;//Base Salaryprize=2344.55f;//BonusesSpeed=30; time=3.4f; //Assigning a value to a variable through an expressionSalary= (int) (basicsalary+prize);//Total SalaryDistance=speed*time;//distance = speed * TimeSystem.out.println ("Letter Alphabet=" +alphabet); System.out.println ("Base salary basicsalary=" +basicsalary); System.out.println ("Bonus prize=" +prize); System.out.println ("Total wage salary=" +salary); System.out.println ("Distance distance=" +distance); }}

2 initialization
Local Variables : must be explicitly initialized.
instance variables and class variables : The compiler can initialize them automatically.
Boolean false
Char ' \000 '
BYTE0 (byte) 0000 0000
Short0 (short) 0000 0000 0000 0000
Int0
long0l
float0.0f
double0.0d

 Package day09;  Public class Testinit {        publicstaticvoid  main (string[] args) {        int  Anum;        Anum=20;        System.out.println (Anum);    }}

 Packageday09; Public classDefaultValue {//declaring class variables    Static BooleanAboolean; Static CharAchar;//'/000 '    Static byteAbyte; Static  ShortAshort; Static intaint; Static floatafloat; //declaring instance variables    Doubleadouble;  Public Static voidMain (string[] args) {System.out.println ("Aboolean=" +Aboolean); System.out.println ("Achar=" +Achar); System.out.println ("Abyte=" +abyte); System.out.println ("Aboolean=" +Aboolean); System.out.println ("Ashort=" +ashort); System.out.println ("Aint=" +aint); System.out.println ("Afloat=" +afloat); //System.out.println ("adouble=" +adouble);    }}

Resources

[1] Java Easy Start Classic tutorial "full version"

Java Section No. 09 assignment and initialization