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8268124: Update java.lang to use switch expressions

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Reviewed-by: naoto, darcy, mchung, iris, lancea, dfuchs
This commit is contained in:
Patrick Concannon 2021-06-10 11:12:37 +00:00
parent a187fcc3ec
commit d43c8a74b3
22 changed files with 421 additions and 551 deletions
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53
src/java.base/share/classes/java/lang/Long.java
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@ -213,38 +213,27 @@ public final class Long extends Number
if (i >= 0)
return toString(i, radix);
else {
switch (radix) {
case 2:
return toBinaryString(i);
case 4:
return toUnsignedString0(i, 2);
case 8:
return toOctalString(i);
case 10:
/*
* We can get the effect of an unsigned division by 10
* on a long value by first shifting right, yielding a
* positive value, and then dividing by 5. This
* allows the last digit and preceding digits to be
* isolated more quickly than by an initial conversion
* to BigInteger.
*/
long quot = (i >>> 1) / 5;
long rem = i - quot * 10;
return toString(quot) + rem;
case 16:
return toHexString(i);
case 32:
return toUnsignedString0(i, 5);
default:
return toUnsignedBigInteger(i).toString(radix);
}
return switch (radix) {
case 2 -> toBinaryString(i);
case 4 -> toUnsignedString0(i, 2);
case 8 -> toOctalString(i);
case 10 -> {
/*
* We can get the effect of an unsigned division by 10
* on a long value by first shifting right, yielding a
* positive value, and then dividing by 5. This
* allows the last digit and preceding digits to be
* isolated more quickly than by an initial conversion
* to BigInteger.
*/
long quot = (i >>> 1) / 5;
long rem = i - quot * 10;
yield toString(quot) + rem;
}
case 16 -> toHexString(i);
case 32 -> toUnsignedString0(i, 5);
default -> toUnsignedBigInteger(i).toString(radix);
};
}
}