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8266622: Optimize Class.descriptorString() and Class.getCanonicalName0()

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Reviewed-by: redestad
This commit is contained in:
Сергей Цыпанов 2021-05-14 12:29:23 +00:00 • committed by Claes Redestad
parent 644f28c0ea
commit ebcf3991b7
1 changed files with 19 additions and 4 deletions
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23
src/java.base/share/classes/java/lang/Class.java
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@ -1722,7 +1722,12 @@ public final class Class<T> implements java.io.Serializable,
String enclosingName = enclosingClass.getCanonicalName();
if (enclosingName == null)
return ReflectionData.NULL_SENTINEL;
return enclosingName + "." + getSimpleName();
String simpleName = getSimpleName();
return new StringBuilder(enclosingName.length() + simpleName.length() + 1)
.append(enclosingName)
.append('.')
.append(simpleName)
.toString();
}
}
@ -4365,10 +4370,20 @@ public final class Class<T> implements java.io.Serializable,
} else if (isHidden()) {
String name = getName();
int index = name.indexOf('/');
return "L" + name.substring(0, index).replace('.', '/')
+ "." + name.substring(index+1) + ";";
return new StringBuilder(name.length() + 2)
.append('L')
.append(name.substring(0, index).replace('.', '/'))
.append('.')
.append(name, index + 1, name.length())
.append(';')
.toString();
} else {
return "L" + getName().replace('.', '/') + ";";
String name = getName().replace('.', '/');
return new StringBuilder(name.length() + 2)
.append('L')
.append(name)
.append(';')
.toString();
}
}