最简单两行代码的问题，求救求救！！！关于replaceAll
public class T
{

public static void main(String[] args)
{
String st= "sssss ";
st.replaceAll( "s ", "$ ");
}

}


Exception in thread "main " java.lang.StringIndexOutOfBoundsException: String index out of range: 1
at java.lang.String.charAt(Unknown Source)
at java.util.regex.Matcher.appendReplacement(Unknown Source)
at java.util.regex.Matcher.replaceAll(Unknown Source)
at java.lang.String.replaceAll(Unknown Source)
at T.main(T.java:7)


[解决办法]
st.replaceAll( "s ", "\\$ ");
[解决办法]
改成
st.replaceAll( "s ", "\\$ ");

[解决办法]
public class T
{

public static void main(String[] args)
{
String st= "sssss ";
System.out.print(st.replaceAll( "s ", "\\$ "));
}

}