Suppose:

intx, y;

String S1, S2, S3;

System.out.print(Enter an integer:);

x = keyboard.nextInt();

System.out.print(Enter a word:);

S1 = keyboard.next();

S2 = dog;

What is wrong with each of the following:

S2 = ((x == 0) : zero ? non-zero);

y = ((x < 0) ? negative : non-negative);

y = ((S1 == true) ? (x*10) : (x*20));

S3 = ((true == false) ? S1 : S2);