Replacing single '\' with '\\' in Java
问题 How do I replace a single '\' with '\\' ? When I run replaceAll() then I get this error message. Exception in thread "main" java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ ^ at java.util.regex.Pattern.error(Pattern.java:1713) at java.util.regex.Pattern.compile(Pattern.java:1466) at java.util.regex.Pattern.<init>(Pattern.java:1133) at java.util.regex.Pattern.compile(Pattern.java:823) at java.lang.String.replaceAll(String.java:2190) at NewClass.main(NewClass