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4993841: (str) java.lang.Character should have a toString(int) method

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Reviewed-by: martin, rriggs, sherman, smarks
This commit is contained in:
Naoto Sato 2018-03-05 08:50:47 -08:00
parent a131e1668f
commit 3d4edcc571
4 changed files with 91 additions and 3 deletions
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25
src/java.base/share/classes/java/lang/String.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1994, 2017, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1994, 2018, 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
@ -3157,4 +3157,27 @@ public final class String
"begin " + begin + ", end " + end + ", length " + length);
}
}
/**
* Returns the string representation of the {@code codePoint}
* argument.
*
* @param codePoint a {@code codePoint}.
* @return a string of length {@code 1} or {@code 2} containing
* as its single character the argument {@code codePoint}.
* @throws IllegalArgumentException if the specified
* {@code codePoint} is not a {@linkplain Character#isValidCodePoint
* valid Unicode code point}.
*/
static String valueOfCodePoint(int codePoint) {
if (COMPACT_STRINGS && StringLatin1.canEncode(codePoint)) {
return new String(StringLatin1.toBytes((char)codePoint), LATIN1);
} else if (Character.isBmpCodePoint(codePoint)) {
return new String(StringUTF16.toBytes((char)codePoint), UTF16);
} else if (Character.isSupplementaryCodePoint(codePoint)) {
return new String(StringUTF16.toBytesSupplementary(codePoint), UTF16);
}
throw new IllegalArgumentException("Not a valid Unicode code point");
}
}