allan.jacobs@Eng 1997-10-30

javac accepts decimal int literals greater than 2147483648.
javac accepts decimal int literals less than -2147483648.
javac accepts decimal int literals greater than 9223372036854775808L.
javac accepts decimal int literals less than -9223372036854775808L.

The language specification in section 3.10.1 says that "a compile-time
error occurs if a decimal literal of type int is larger than 2147483648
(2^31), or if the literal 2147483648 appears anywhere other than as
the operand of the unary - operator, or if a hexadecimal or octal int
literal does not fit in 32 bits."

The language specification in section 3.10.1 says that "a compile-time
error occurs if a decimal literal of type long is larger than
9223372036854775808L (2^63), or if the literal 9223372036854775808L appears
anywhere other than as the operand of the unary - operator, or if a
hexadecimal or octal long literal does not fit in 64 bits."




algol% cat X.java

class X{
  public static void main( String[] argv ) {
    int i0 = 2147483647;
    int i1 = -2147483648;
    int i2 = 2147483648;
    int i3 = 10000000000;
    int i4 = -10000000000;
    long l0 = 9223372036854775807L;
    long l1 = -9223372036854775808L;
    long l2 = 9223372036854775808L;
    long l3 = 10000000000000000000L;
    long l4 = -10000000000000000000L;
  }
}
algol% javac -d . X.java
X.java:6: Numeric overflow.
    int i2 = 2147483648;
               ^
X.java:11: Numeric overflow.
    long l2 = 9223372036854775808L;
                ^
X.java:12: Numeric overflow.
    long l3 = 10000000000000000000L;
               ^
X.java:13: Numeric overflow.
    long l4 = -10000000000000000000L;
               ^
4 errors
algol% fastjavac -d . X.java
Java WorkShop 2.0 fastjavac 1.0 Copyright (c) 1997 Sun Microsystems, Inc.
X.java:6: Literal overflows capacity of int type
    int i2 = 2147483648;
               ^
X.java:7: Literal overflows capacity of int type
    int i3 = 10000000000;
              ^
X.java:8: Literal overflows capacity of int type
    int i4 = -10000000000;
              ^
X.java:11: Literal overflows capacity of long type
    long l2 = 9223372036854775808L;
                ^
X.java:11: Literal overflows capacity of long type
    long l2 = 9223372036854775808L;
                ^
X.java:12: Literal overflows capacity of long type
    long l3 = 10000000000000000000L;
               ^
X.java:13: Literal overflows capacity of long type
    long l4 = -10000000000000000000L;
               ^
7 errors