How to replace a plus character using Java's String.replaceAll method
You need to escape the +
for the regular expression, using \
.
However, Java uses a String parameter to construct regular expressions, which uses \
for its own escape sequences. So you have to escape the \
itself:
"\\+"
when in doubt, let java do the work for you:
myStr.replaceAll(Pattern.quote("+"), replaceStr);
You'll need to escape the + with a \ and because \ is itself a special character in Java strings you'll need to escape it with another \.
So your regex string will be defined as "\\+" in Java code.
I.e. this example:
String test = "ABCD+EFGH";
test = test.replaceAll("\\+", "-");
System.out.println(test);