Java

Question 1

Is this following code valid:

float pi1 = 3_.1415F

Answer 1

Invalid, cannot put underscores adjacent to a decimal point

Question 2

Is this following code valid:

long socialSecurityNumber1 = 999_99_9999_L

Answer 2

Invalid: cannot put underscores prior to an L suffix

Question 3

Is this following code valid:

int x1 = 5_2;

Answer 3

OK

Question 4

Is this following code valid:

int x2 = 52_;

Answer 4

Invalid: cannot put underscores at the end of a literal

Question 5

Is this following code valid:

int x4 = 0_x52;

Answer 5

Invalid: cannot put underscores in the 0x radix prefix

Question 6

Is this following code valid:

int x5 = 0x_52;

Answer 6

Invalid: cannot put underscores in the 0x radix prefix

Question 7

Is this following code valid:

int x7 = 0x52_;

Answer 7

Invalid: cannot put underscores at the end of a number