Question

for java

12) Suppose you have defined variables int x 42 String y ="lunchtime" a) Evaluate each expression below y.equals ("breakfast") 11 x !-42 5 1 (y.length )>0 66 ! (x < =0)) x !( (x>0 GG x > 1) || x > 2) b) Using the variables x and y above, for each phrase below, write a Java boolean expression that captures its meaning. Then determine whether the expression is true or false using the values of x and y above. x is at least 25 x is between 25 and 50, inclusive (i.e., including the endpoints of the interval) y is either 10 or 12 characters long x is equal to the three times the length of y the length of y is not divisible by 3 x is negative or else x is even and divisible by 3 y is not equal to the string "dinner" Adug c) The method foo) from Problem 1 has three conditional statements ("if" statements). Rewrite that method so that it produces the same results, but without using any conditional statements. nd 101 n0n intion ae narameters (You don't have to (01

Answer 1

Solution

12)

a)

false
true
false

Explanation

lI Result Execute Share Source File STDIN public class problema { public static void main(String [Jargs) { int x - 42; String y = "lunchtime "; boolean a,b, c; $javac problema.java 2 $java -Xmx128M -Xms16M problema false 4 - true false 6 7 8 a-(y.equals("breakfast") || x != 42); b-(x 5 || (y.length() > 0 && !(x <= 0))); c=(!((x System.out.println ( a) ; System.out.println(b); System.out.println (c) ; 16 0 && x> 1) || x > 2)); 11 12 13 14 15 16 17

b)

x is at least 25 True

x is between 25 and 50, inclusive (i.e., including the endpoints of the interval) True

y is either 10 or 12 characters long False

x is equal to the three times the length of y False

the length of y is not divisible by 3 False

x is negative or else x is even and divisible by 3 True

y is not equal to the string “dinner” True

--

all the best