Java Reference
In-Depth Information
The following program evaluates and outputs the values of these logical expressions.
//Logical operators
public class
LogicalOperators
{
public static void
main(String[] args)
{
boolean
found =
true
;
double
hours = 45.30;
double
overTime = 15.00;
int
count = 20;
char
ch = 'B';
System.out.printf("found = %b, hours = %.2f, overTime = "
+ "%.2f, count = %2d, ch = %c%n%n",
found, hours, overTime, count, ch);
System.out.println("!found evaluates to " + !found);
System.out.println("hours > 40.00 evaluates to "
+ (hours > 40.00));
System.out.println("!found && (hours >= 0) evaluates to "
+ (!found && (hours >= 0)));
System.out.println("!(found && (hours >= 0)) evaluates to "
+ (!(found && (hours >= 0))));
System.out.println("hours + overTime <= 75.00 evaluates to "
+ (hours + overTime <= 75.00));
System.out.println("(count >= 0) && (count <= 100) "
+ "evaluates to "
+ ((count >= 0) && (count <= 100)));
System.out.println("('A' <= ch && ch <= 'Z') evaluates to "
+ ('A' <= ch && ch <= 'Z'));
}
}
Sample Run:
found = true, hours = 45.30, overTime = 15.00, count = 20, ch = B
!found evaluates to false
hours > 40.00 evaluates to true
!found && (hours >= 0) evaluates to false
!(found && (hours >= 0)) evaluates to false
hours + overTime <= 75.00 evaluates to true
(count >= 0) && (count <= 100) evaluates to true
('A' <= ch && ch <= 'Z') evaluates to true
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