if the first condition fails then the second condition will be examine -java [duplicate]

Question

if i have a while condition in java as follows while(j>=1 && i<=7) my question is if the first condition fails then the second condition will be examine?? in other word if j=0 the compiler will check if I<=7 or it will ignore it . please help me thank you

Answer 1

No, if the first condition returns false then the whole expression automatically returns false.

Java will not bother examining the other condition.

Answer 2

(j>=1 && i<=7 && cond1 && cond2 && ... && condN) // will evaluate until the one condition fails
(j>=1  & i<=7  & cond1  & cond2  & ...  & condN) // will evaluate all the conditions

and with or

(j>=1 || i<=7 || cond1 || cond2 || ... || condN) // will evaluate until the one condition is true
(j>=1  | i<=7  | cond1  | cond2  | ...  | condN) // will evaluate all conditions

example:

lets use this 2 methods:

public boolean isTrue(){
  System.out.println("true");
  return true;
}

public boolean isFalse(){
  System.out.println("false");
  return false;
}

so, in the first case:

boolean cond = isFalse() && isTrue(); 

output is:

 false

value of cond is false

and in the second case:

boolean cond = isFalse() & isTrue(); 

output is:

 false
 true

value of cond is false