Specifications

Sun Services

Java™ Programming Language

Module 4, slide 17 of 31

Promotion and Casting of Expressions

• Variables are promoted automatically to a longer form

(such as int to long).

• Expression is assignment-compatible if the variable type

is at least as large (the same number of bits) as the

expression type.

long bigval = 6; // 6 is an int type, OK

int smallval = 99L; // 99L is a long, illegal

double z = 12.414F; // 12.414F is float, OK

float z1 = 12.414; // 12.414 is double, illegal