/*
* Copyright ( c ) 2019 , 2020 , 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
* under the terms of the GNU General Public License version 2 only , as
* published by the Free Software Foundation .
*
* This code is distributed in the hope that it will be useful , but WITHOUT
* ANY WARRANTY ; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
* version 2 for more details ( a copy is included in the LICENSE file that
* accompanied this code ) .
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work ; if not , write to the Free Software Foundation ,
* Inc . , 51 Franklin St , Fifth Floor , Boston , MA 02110 - 1301 USA .
*
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*/
/**
* @ test
* @ bug 8218227
* @ summary StringBuilder / StringBuffer constructor throws confusing
* NegativeArraySizeException
* @ requires ( sun . arch . data . model = = " 64 " & os . maxMemory > = 8 G )
* @ run main / othervm - Xms6G - Xmx6G HugeCapacity
*/
public class HugeCapacity {
private static int failures = 0 ;
public static void main(String[] args) {
testHugeInitialString();
testHugeInitialCharSequence();
if (failures > 0 ) {
throw new RuntimeException(failures + " tests failed" );
}
}
private static void testHugeInitialString() {
try {
String str = "Z" .repeat(Integer.MAX_VALUE - 8 );
StringBuffer sb = new StringBuffer(str);
} catch (OutOfMemoryError ignore) {
} catch (Throwable unexpected) {
unexpected.printStackTrace();
failures++;
}
}
private static void testHugeInitialCharSequence() {
try {
CharSequence seq = new MyHugeCharSeq();
StringBuffer sb = new StringBuffer(seq);
} catch (OutOfMemoryError ignore) {
} catch (Throwable unexpected) {
unexpected.printStackTrace();
failures++;
}
}
private static class MyHugeCharSeq implements CharSequence {
public char charAt(int i) {
throw new UnsupportedOperationException();
}
public int length() { return Integer.MAX_VALUE; }
public CharSequence subSequence(int st, int e) {
throw new UnsupportedOperationException();
}
public String toString() { return "" ; }
}
}
Messung V0.5 in Prozent C=94 H=79 G=86
¤ Dauer der Verarbeitung: 0.8 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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