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8270392: Improve String constructions

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Reviewed-by: rhalade, dfuchs, robm, ahgross, smarks
This commit is contained in:
Julia Boes 2021-09-27 08:59:16 +00:00 • committed by Henry Jen
parent abf6fdd75a
commit 4525a4b94d
2 changed files with 48 additions and 31 deletions
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24
src/java.base/share/classes/java/lang/StringBuilder.java
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@ -28,6 +28,10 @@ package java.lang;
import jdk.internal.vm.annotation.IntrinsicCandidate;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serial;
import java.io.StreamCorruptedException;
/**
* A mutable sequence of characters. This class provides an API compatible
@ -90,7 +94,7 @@ public final class StringBuilder
{
/** use serialVersionUID for interoperability */
@java.io.Serial
@Serial
static final long serialVersionUID = 4383685877147921099L;
/**
@ -464,9 +468,8 @@ public final class StringBuilder
* @param s the {@code ObjectOutputStream} to which data is written
* @throws IOException if an I/O error occurs
*/
@java.io.Serial
private void writeObject(java.io.ObjectOutputStream s)
throws java.io.IOException {
@Serial
private void writeObject(ObjectOutputStream s) throws IOException {
s.defaultWriteObject();
s.writeInt(count);
char[] val = new char[capacity()];
@ -486,13 +489,16 @@ public final class StringBuilder
* @throws IOException if an I/O error occurs
* @throws ClassNotFoundException if a serialized class cannot be loaded
*/
@java.io.Serial
private void readObject(java.io.ObjectInputStream s)
throws IOException, ClassNotFoundException {
@Serial
private void readObject(ObjectInputStream s)
throws IOException, ClassNotFoundException {
s.defaultReadObject();
count = s.readInt();
int c = s.readInt();
char[] val = (char[]) s.readObject();
if (c < 0 || c > val.length) {
throw new StreamCorruptedException("count value invalid");
}
initBytes(val, 0, val.length);
count = c;
}
}