Data Type

Group	Data Type	Size	Range
Integer	byte	1 byte	Stores whole numbers from -128 to 127
	short	2 bytes	Stores whole numbers from -32,768 to 32,767
	int	4 bytes	Stores whole numbers from -2,147,483,648 to 2,147,483,647
	long	8 bytes	Stores whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
Floating-point	float	4 bytes	Stores fractional numbers. Sufficient for storing 6 to 7 decimal digits
	double	8 bytes	Stores fractional numbers. Sufficient for storing 15 to 16 decimal digits
Character	char	1 bytes	Stores a single character/letter or ASCII values
	String	1
Boolean	boolean	1 bytes	Stores true or false values

Input vs Output

Type	Example	Format	Scanner scan = new Scanner(System.in);
Integer	byte a = 7;	System.out.printf("%d", a);	byte a = scan.nextByte();
	short a = 9;		short a = scan.nextShort();
	int a = 9;		int a = scan.nextInt();
	long f = 9;		long f = scan.nextLong();
Floating-point	float f = 7.3f;	System.out.printf("%f", f);	float f = scan.nextFloat();
	double a = 7.9;		double a = scan.nextDouble();
Character	char ch = 'A';	System.out.printf("%c", ch);	char ch = scan.next().charAt(0);
String	String s = "Hello";	System.out.printf("%s", s);	String s = scan.nextLine();
Boolean	boolean b = true;	System.out.printf("%b", b);	boolean b = scan.nextBoolean();