Dead-Knock Java (2)

Java Data types

Boolean--true--false

BYTE--8 bits

Short--16 bit

INT--32 bits

Long--64-bit

Char

Float--32-bit

Double--64 bits

Floating point Standard i-eee-754

Cannot guarantee accuracy, deposit Money data recommended int,9.99 Yuan = 999 points, no loss of risk. You can also use a dedicated class BigDecimal

public void Int3 ()
{
int b = 0b010101_010101_111;

/* Using 0b means binary can be divided with "_" to facilitate identification */
System.out.print (b);
}

public void Boolean2 ()
{
Boolean boolean2 = true;
String str = "Hellow" +BOOLEAN2;
System.out.print (str);

/* Output Hellowtrue,boolean converted to true*/
}

Basic type automatic conversion from small to large range

Forced type conversions, ranging from large to small, with loss of precision

Data in Java can be understood using pointers, int a = 8;

Indicates that the data for the address pointed to by a pointer is 8;

In this way, most of the questions about data types can be understood

Operator

+

-

*

/

%

+=

-=

^

~

&

|

<<

>>

>>>

Can be used and understood in C language

Dead-Knock Java (2)