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6964528: Double.toHexString(double d) String manipulation with + in an append of StringBuilder

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Reviewed-by: shade
This commit is contained in:
Joe Darcy 2013-02-01 19:30:02 -08:00
parent 854e269f20
commit 0050c5b4fb
1 changed files with 7 additions and 7 deletions
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14
jdk/src/share/classes/java/lang/Double.java
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 1994, 2012, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 1994, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* *
* This code is free software; you can redistribute it and/or modify it * This code is free software; you can redistribute it and/or modify it
@ -289,7 +289,7 @@ public final class Double extends Number implements Comparable<Double> {
return Double.toString(d); return Double.toString(d);
else { else {
// Initialized to maximum size of output. // Initialized to maximum size of output.
StringBuffer answer = new StringBuffer(24); StringBuilder answer = new StringBuilder(24);
if (Math.copySign(1.0, d) == -1.0) // value is negative, if (Math.copySign(1.0, d) == -1.0) // value is negative,
answer.append("-"); // so append sign info answer.append("-"); // so append sign info
@ -300,8 +300,7 @@ public final class Double extends Number implements Comparable<Double> {
if(d == 0.0) { if(d == 0.0) {
answer.append("0.0p0"); answer.append("0.0p0");
} } else {
else {
boolean subnormal = (d < DoubleConsts.MIN_NORMAL); boolean subnormal = (d < DoubleConsts.MIN_NORMAL);
// Isolate significand bits and OR in a high-order bit // Isolate significand bits and OR in a high-order bit
@ -324,13 +323,14 @@ public final class Double extends Number implements Comparable<Double> {
"0": "0":
signif.replaceFirst("0{1,12}$", "")); signif.replaceFirst("0{1,12}$", ""));
answer.append('p');
// If the value is subnormal, use the E_min exponent // If the value is subnormal, use the E_min exponent
// value for double; otherwise, extract and report d's // value for double; otherwise, extract and report d's
// exponent (the representation of a subnormal uses // exponent (the representation of a subnormal uses
// E_min -1). // E_min -1).
answer.append("p" + (subnormal ? answer.append(subnormal ?
DoubleConsts.MIN_EXPONENT: DoubleConsts.MIN_EXPONENT:
Math.getExponent(d) )); Math.getExponent(d));
} }
return answer.toString(); return answer.toString();
} }