我不擅长的正则表达式,我试图使用java.lang.String
replaceAll()
方法与代码段如下正则表达式:PatternSyntaxException:非法重复
A为:
public class method3 {
public static int addTwoNumbers(int one, int two){
return one+two;
}
public static void main (String[] args){
int total = addTwoNumbers(1, 3);
System.out.println(total);
}
}
与乙取代
null
public class method3 {
/* some writting */
public static int addTwoNumbers(int one, int two){
return one+two;
}
/*more text*/
public static void main (String[] args){
int total = addTwoNumbers(1, 3);
System.out.println(total);
}//end of
}
这是给我以下错误
java.util.regex.PatternSyntaxException: Illegal repetition
我猜这与/**/
字符有关?
你是如何分类的,还有其他需要注意的角色吗?
编辑:这是错误消息
Exception in thread "AWT-EventQueue-0" java.util.regex.PatternSyntaxException: Illegal repetition near index 25
null
public class method2 {
public static int addTwoNumbers(int one, int two){
return one+two;
}
public static void main (String[] args){
int total = addTwoNumbers(1, 3);
System.out.println(total);
}
}
^
at java.util.regex.Pattern.error(Pattern.java:1924)
at java.util.regex.Pattern.closure(Pattern.java:3104)
at java.util.regex.Pattern.sequence(Pattern.java:2101)
at java.util.regex.Pattern.expr(Pattern.java:1964)
at java.util.regex.Pattern.compile(Pattern.java:1665)
at java.util.regex.Pattern.<init>(Pattern.java:1337)
....
调用的replaceAll()
String a = readFile(directoryToAddFile,startOfCode, endOfCode);
String b = textarea.getText().toString();
String content = IOUtils.toString(new FileInputStream(directoryToAddFile));
content = content.replaceAll(a, b);
IOUtils.write(content, new FileOutputStream(directoryToAddFile));
该代码片段是不是他们? – RNJ
如果您显示失败的代码,这将有所帮助。是的,'*'在正则表达式中具有特殊含义......但是可能正则表达式不是这里最好的方法。 –
调用replaceAll在哪里? – KidTempo