Data type, Type Casting,Constants. DATA TYPES IN JAVA.

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Presentation transcript:

Data type, Type Casting,Constants

DATA TYPES IN JAVA

Data types in java Every variable declared in a Java program is having the data type. Data type specifies the size and type of values that a variable can have. Java has a rich set of data types.

Integer Data Type

Real Data Type

Character & Boolean Data Type Character :In order to store single character constant in a variable, character data type is used. - minimum value is ‘\u000’=0 - maximum value is ‘\uffff’=65535 Boolean :Boolean data type is used to store two different values. But,values stored inside the boolean type will only be true and false.

Type Casting

What is type casting? Changing a value from one data type to another data type is known as data type conversion i.e. assigning a value of one type of a variable of another type is known as type casting. Types of type casting: 1.Widening Type Casting (Implicit) 2.Narrowing Type Casting ( Explicit)

Widening Type Casting (Implicit) If a value of lower size data type converted to a value of higher size data type without loss of information is Implicit casting.

Narrowing Type Casting ( Explicit) If a value of higher size data type converted to a value of lower size data type without loss of information is Implicit casting.

MSBTE Question Bank: Q1.Write all primitive data type available in java with their storage sizes in bytes.(w-9, s-12).Write all primitive data type available in java with their storage sizes in bytes Q2. List different data types in java.(s-10). List different data types in java Q3. Give all the primitive data types available in java with their strorage size in bytes. (s-13) Q4. Explain ‘type casting ‘ with example.(s-11)Explain ‘type casting ‘ with example Q5. What do you mean by type casting ?when is it needed?(w-12). What do you mean by type casting ?when is it needed?(