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* 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 .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
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* questions .
*/
/**
* @ test
* @ bug 6840246 6559590
* @ summary test String . split ( )
* @ key randomness
*/
import java.util.Arrays;
import java.util.Random;
import java.util.regex.*;
public class Split {
public static void main(String[] args) throws Exception {
String source = "0123456789" ;
for (int limit=-2 ; limit<3 ; limit++) {
for (int x=0 ; x<10 ; x++) {
String[] result = source.split(Integer.toString(x), limit);
int expectedLength = limit < 1 ? 2 : limit;
if ((limit == 0 ) && (x == 9 )) {
// expected dropping of ""
if (result.length != 1 )
throw new RuntimeException("String.split failure 1" );
if (!result[0 ].equals("012345678" )) {
throw new RuntimeException("String.split failure 2" );
}
} else {
if (result.length != expectedLength) {
throw new RuntimeException("String.split failure 3" );
}
if (!result[0 ].equals(source.substring(0 ,x))) {
if (limit != 1 ) {
throw new RuntimeException(
"String.split failure 4" );
} else {
if (!result[0 ].equals(source.substring(0 ,10 ))) {
throw new RuntimeException(
"String.split failure 10" );
}
}
}
if (expectedLength > 1 ) { // Check segment 2
if (!result[1 ].equals(source.substring(x+1 ,10 )))
throw new RuntimeException("String.split failure 5" );
}
}
}
}
// Check the case for no match found
for (int limit=-2 ; limit<3 ; limit++) {
String[] result = source.split("e" , limit);
if (result.length != 1 )
throw new RuntimeException("String.split failure 6" );
if (!result[0 ].equals(source))
throw new RuntimeException("String.split failure 7" );
}
// Check the case for limit == 0, source = "";
// split() now returns 0-length for empty source "" see #6559590
source = "" ;
String[] result = source.split("e" , 0 );
if (result.length != 1 )
throw new RuntimeException("String.split failure 8" );
if (!result[0 ].equals(source))
throw new RuntimeException("String.split failure 9" );
// check fastpath of String.split()
source = "0123456789abcdefgABCDEFG" ;
Random r = new Random();
for (boolean doEscape: new boolean [] {false , true }) {
for (int cp = 0 ; cp < 0 x11000; cp++) {
Pattern p = null ;
String regex = new String(Character.toChars(cp));
if (doEscape)
regex = "\\" + regex;
try {
p = Pattern.compile(regex);
} catch (PatternSyntaxException pse) {
// illegal syntax
try {
"abc" .split(regex);
} catch (PatternSyntaxException pse0) {
continue ;
}
throw new RuntimeException("String.split failure 11" );
}
int off = r.nextInt(source.length());
String[] srcStrs = new String[] {
"" ,
source,
regex + source,
source + regex,
source.substring(0 , 3 )
+ regex + source.substring(3 , 9 )
+ regex + source.substring(9 , 15 )
+ regex + source.substring(15 ),
source.substring(0 , off) + regex + source.substring(off)
};
for (String src: srcStrs) {
for (int limit=-2 ; limit<3 ; limit++) {
if (!Arrays.equals(src.split(regex, limit),
p.split(src, limit)))
throw new RuntimeException("String.split failure 12" );
}
}
}
}
}
}
Messung V0.5 in Prozent C=94 H=80 G=87
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-10-11)
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