Java Logical operator Understanding

1.1 logical Operators

The logical operator, which is used for Boolean operations, and the final result of the operation is a Boolean value of True or false.

Operator	Arithmetic rules	Example	Results
&	And	False&true	False
|	Or	False|true	True
^	XOR or	True^flase	True
!	Non -	!true	Flase
&&	Short Circuit and	False&&true	False
||	Short Circuit or	false| | True	True

After reading the graph, let's look at the general use of logical operators:

L logical operators usually concatenate two other expressions to evaluate the result of a Boolean value

L when the use of short-circuit and or short-circuit or, as long as the results can be judged, the back part is no longer judged.

int x = 1,y = 1;

if (x++==2 & ++y==2)
{
x = 7;
}
System.out.println ("x=" +x+ ", y=" +y);

& and, go through the conditions, regardless of the outcome of the right and wrong. The loop body is entered when the condition is satisfied.

int x = 1,y = 1;

if (x++==2 && ++y==2)
{
x = 7;
}
System.out.println ("x=" +x+ ", y=" +y);

&& Short circuit and, a short circuit will not go, if the first result is false, then the back will not go, the direct end (jump out of the loop), if not go down.

int x = 1,y = 1;

if (x++==1 | ++y==1)
{
x = 7;
}
System.out.println ("x=" +x+ ", y=" +y);

| or, as long as there is a condition to be satisfied, enter the loop body, and go through the whole condition

int x = 1,y = 1;

if (x++==1 | | ++y==1)
{
x = 7;
}
System.out.println ("x=" +x+ ", y=" +y);

|| Short circuit or, as long as there is a condition to not go behind, such as the first meet the conditions, do not go behind, directly into the loop body.

Java Logical operator Understanding