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POjava.util.regex.PatternSyntaxException on Android
 

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  1. POjava.util.regex.PatternSyntaxException on Android
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    <p>I am getting a <code>java.util.regex.PatternSyntaxException</code> when trying to call string.split() with the regex <code>(?&lt;=}),(?=\\{)</code> against a string such as "{test},{test}"</p> <p>This works fine when I run it in a unit test on the JVM (ie. not on Android) but on Android I get the following stack trace:</p> <pre><code> java.util.regex.PatternSyntaxException: Syntax error U_REGEX_RULE_SYNTAX near index 5: (?&lt;=}),(?=\{) ^ at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) at android.app.ActivityThread.access$1500(ActivityThread.java:117) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:130) at android.app.ActivityThread.main(ActivityThread.java:3683) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:507) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) at dalvik.system.NativeStart.main(Native Method) Caused by: java.util.regex.PatternSyntaxException: Syntax error U_REGEX_RULE_SYNTAX near index 5: (?&lt;=}),(?=\{) ^ at java.util.regex.Pattern.compileImpl(Native Method) at java.util.regex.Pattern.compile(Pattern.java:400) at java.util.regex.Pattern.&lt;init&gt;(Pattern.java:383) at java.util.regex.Pattern.compile(Pattern.java:374) at java.lang.String.split(String.java:2021) at java.lang.String.split(String.java:2002) </code></pre> <p>I'm wondering if the Android runtime doesn't support regex lookaheads, can anyone confirm this or offer any suggestions for solving this?</p>
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    1. USRupert Bates
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    1. CODid you try to escape the '}' character as well?
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    2. COthe '}' character doesn't need to be escaped and if you try it it makes the regex illegal
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      1. POjava.util.regex.PatternSyntaxException on Android
      1. USRupert Bates
 

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