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String testStr = "\test";
System.out.println(testStr.replaceAll("\\", "_"));
Exception in thread "main" java.util.regex.PatternSyntaxException: Unexpected internal error near index 1
\
^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.util.regex.Pattern.<init>(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.lang.String.replaceAll(Unknown Source)
at lmiky.test.string.SubStringTest.main(SubStringTest.java:101)
public class M
{
public static void main(String[] args)
{
String str = "\\test";
System.out.println(str);
System.out.println(str.replaceAll("\\\\","_"));
}
};