Java example source code file (UnderscoreLiterals.java)
The UnderscoreLiterals.java Java example source code
/*
* Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 6860973
* @summary Project Coin: Underscores in literals
*/
public class UnderscoreLiterals {
public static void main(String... args) throws Exception {
new UnderscoreLiterals().run();
}
public void run() throws Exception {
// decimal
test(1, 1);
test(10, 10);
test(1_0, 10);
test(1__0, 10);
test(1_0_0, 100);
test(1__0__0, 100);
test(123_456_789, 123456789);
test(2_147_483_647, Integer.MAX_VALUE);
test(-2_147_483_648, Integer.MIN_VALUE);
test(32_767, Short.MAX_VALUE);
test(-32_768, Short.MIN_VALUE);
test(1_2_7, Byte.MAX_VALUE);
test(-1_2_8, Byte.MIN_VALUE);
// long
test(1l, 1l);
test(10l, 10l);
test(1_0l, 10l);
test(1__0l, 10l);
test(1_0_0l, 100l);
test(1__0__0l, 100l);
test(123_456_789l, 123456789l);
test(9_223_372_036_854_775_807l, Long.MAX_VALUE);
test(-9_223_372_036_854_775_808l, Long.MIN_VALUE);
// float
test(.1f, .1f);
test(.10f, .10f);
test(.1_0f, .10f);
test(.1__0f, .10f);
test(.1_0_0f, .100f);
test(.1__0__0f, .100f);
test(1e1, 1e1);
test(1e10, 1e10);
test(1e1_0, 1e10);
test(1e1__0, 1e10);
test(1e1_0_0, 1e100);
test(1e1__0__0, 1e100);
test(.123_456_789f, .123456789f);
test(0.1f, 0.1f);
test(0.10f, 0.10f);
test(0.1_0f, 0.10f);
test(0.1__0f, 0.10f);
test(0.1_0_0f, 0.100f);
test(0.1__0__0f, 0.100f);
test(0.123_456_789f, 0.123456789f);
test(1_1.1f, 1_1.1f);
test(1_1.10f, 1_1.10f);
test(1_1.1_0f, 1_1.10f);
test(1_1.1__0f, 1_1.10f);
test(1_1.1_0_0f, 1_1.100f);
test(1_1.1__0__0f, 1_1.100f);
test(1_1.123_456_789f, 1_1.123456789f);
test(3.4_028_235E38f, Float.MAX_VALUE);
test(1.4E-4_5f, Float.MIN_VALUE);
// double
test(.1d, .1d);
test(.10d, .10d);
test(.1_0d, .10d);
test(.1__0d, .10d);
test(.1_0_0d, .100d);
test(.1__0__0d, .100d);
test(1e1, 1e1);
test(1e10, 1e10);
test(1e1_0, 1e10);
test(1e1__0, 1e10);
test(1e1_0_0, 1e100);
test(1e1__0__0, 1e100);
test(.123_456_789d, .123456789d);
test(0.1d, 0.1d);
test(0.10d, 0.10d);
test(0.1_0d, 0.10d);
test(0.1__0d, 0.10d);
test(0.1_0_0d, 0.100d);
test(0.1__0__0d, 0.100d);
test(0.123_456_789d, 0.123456789d);
test(1_1.1d, 1_1.1d);
test(1_1.10d, 1_1.10d);
test(1_1.1_0d, 1_1.10d);
test(1_1.1__0d, 1_1.10d);
test(1_1.1_0_0d, 1_1.100d);
test(1_1.1__0__0d, 1_1.100d);
test(1_1.123_456_789d, 1_1.123456789d);
test(1.797_6_9_3_1_348_623_157E3_08, Double.MAX_VALUE);
test(4.9E-3_24, Double.MIN_VALUE);
// binary
test(0b1, 1);
test(0b10, 2);
test(0b1_0, 2);
test(0b1__0, 2);
test(0b1_0_0, 4);
test(0b1__0__0, 4);
test(0b0001_0010_0011, 0x123);
test(0b111_1111_1111_1111_1111_1111_1111_1111, Integer.MAX_VALUE);
test(0b1000_0000_0000_0000_0000_0000_0000_0000, Integer.MIN_VALUE);
test(0b111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111_1111l, Long.MAX_VALUE);
test(0b1000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000l, Long.MIN_VALUE);
test(0b111_1111_1111_1111, Short.MAX_VALUE);
test((short)-0b1000_0000_0000_0000, Short.MIN_VALUE);
test(0b111_1111, Byte.MAX_VALUE);
test((byte)-0b1000_0000, Byte.MIN_VALUE);
// octal
test(01, 1);
test(010, 8);
test(01_0, 8);
test(01__0, 8);
test(01_0_0, 64);
test(01__0__0, 64);
test(0_1, 1);
test(0_10, 8);
test(0_1_0, 8);
test(0_1__0, 8);
test(0_1_0_0, 64);
test(0_1__0__0, 64);
test(0_001_002_003, 01002003);
test(0177_7777_7777, Integer.MAX_VALUE);
test(-0200_0000_0000, Integer.MIN_VALUE);
test(077_77_77_77_77_7_77_77_77_77_77l, Long.MAX_VALUE);
test(-010_00_00_00_00_00_00_00_00_00_00l, Long.MIN_VALUE);
test((short)07_77_77, Short.MAX_VALUE);
test((short)-010_00_00, Short.MIN_VALUE);
test(01_77, Byte.MAX_VALUE);
test((byte)-02_00, Byte.MIN_VALUE);
// hexadecimal
test(0x1, 1);
test(0x10, 16);
test(0x1_0, 16);
test(0x1__0, 16);
test(0x1_0_0, 256);
test(0x1__0__0, 256);
test(0x01_02_03_04, 0x1020304);
test(0x7f_ff_ff_ff, Integer.MAX_VALUE);
test(0x80_00_00_00, Integer.MIN_VALUE);
test(0x1.f_ff_ffep127f, Float.MAX_VALUE);
test(0x0.00_00_02p-126f, Float.MIN_VALUE);
test(0x1.f__ff_ff_ff_ff_ff_ffp1_023, Double.MAX_VALUE);
test(0x0.000_000_000_000_1p-1_022, Double.MIN_VALUE);
test(0x7f_ff_ff_ff_ff_ff_ff_ffl, Long.MAX_VALUE);
test(0x80_00_00_00_00_00_00_00l, Long.MIN_VALUE);
test(0x7f_ff, Short.MAX_VALUE);
test((short)0x80_00, Short.MIN_VALUE);
test(0x7_f, Byte.MAX_VALUE);
test((byte)0x8_0, Byte.MIN_VALUE);
// misc
long creditCardNumber = 1234_5678_9012_3456L;
test(creditCardNumber, 1234567890123456L);
long socialSecurityNumbers = 999_99_9999L;
test(socialSecurityNumbers, 999999999L);
double monetaryAmount = 12_345_132.12d;
test(monetaryAmount, 12345132.12d);
long hexBytes = 0xFF_EC_DE_5E;
test(hexBytes, 0xffecde5e);
long hexWords = 0xFFEC_DE5E;
test(hexWords, 0xffecde5e);
long maxLong = 0x7fff_ffff_ffff_ffffL;
test(maxLong, 0x7fffffffffffffffL);
long maxLongDecimal = 9223372036854775807L;
long alsoMaxLong = 9_223_372_036_854_775_807L;
test(alsoMaxLong, maxLongDecimal);
double whyWouldYouEverDoThis = 0x1.ffff_ffff_ffff_fp10_23;
double whyWouldYouEverDoEvenThis = 0x1.fffffffffffffp1023;
test(whyWouldYouEverDoThis, whyWouldYouEverDoEvenThis);
if (errors > 0)
throw new Exception(errors + " errors found");
}
void test(int value, int expect) {
count++;
if (value != expect)
error("test " + count + "\nexpected: 0x" + Integer.toHexString(expect) + "\n found: 0x" + Integer.toHexString(value));
}
void test(double value, double expect) {
count++;
if (value != expect)
error("test " + count + "\nexpected: 0x" + expect + "\n found: 0x" + value);
}
void test(long value, long expect) {
count++;
if (value != expect)
error("test " + count + "\nexpected: 0x" + Long.toHexString(expect) + "\n found: 0x" + Long.toHexString(value));
}
void error(String message) {
System.out.println(message);
errors++;
}
int count;
int errors;
}
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