[Java] java.lang.IllegalArgumentException: named capturing group has 0 length name

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### Error (에러)

```no

java.lang.IllegalArgumentException: named capturing group has 0 length name

```

### Problem (문제)

### Solved(해결)

JAVA

```java

replacement = replacement.replaceAll("\\$", "\\\\\\$");

strToReplace = strToReplace.replaceAll(reg, replacement);

```

GROOVY

```groovy

replacement = replacement.replaceAll('\\$', '\\\\\\$')

strToReplace = strToReplace.replaceAll(reg, replacement)

```

### Refference (참고)

[http://sojw.tistory.com/1169741915](http://sojw.tistory.com/1169741915)