The difference between the "&&" and "&" of the Java face Test __java

logical operators: With (&&) or (| | ) Non (. )

, "&&" and "| |" is called a short-circuit operator

and , "&" and "|" Known as a non-short-circuit operator (less used, logically unreasonable)

The difference between a short-circuit operator and a non-short-circuit operator:

short-circuit operator : [Condition 1 && Condition 2], if condition 1 is not tenable, condition 2 does not perform a non-short-circuit operator : [Condition 1 && Condition 2], regardless of condition 1, continue to execute condition 2

For example: Execute short-circuit operator, code:

int a=1;
int b=2;
if (a==1 && b++==3) {
   System.out.println ("Conditional 1,2 set up");
}
System.out.println (b);

Result output:

2

To perform a non-short-circuit operator code:

int a=1;
int b=2;
if (A==1 & b++==3) {
   System.out.println ("Conditional 1,2 set up");
}
System.out.println (b);

Result output:

3

or ("| |") and "|" Empathy

The main difference is that

"&&" and "&"

Condition 1 if not established, continue to execute condition 2

"| |" and "|"

Condition 1 if not established, continue to execute condition 2