如何用字符串中的反斜杠美元替换美元字符

Question

I have a String like this:

String str = "aLnx5$bK$#C4EFg"; 

And I want to replace all the dollar $ characters with backslash dollar \\$ , in order to get:

String expectedString = "aLnx5\$bK\$#C4EFg";

Answer 1

String str = "aLnx5$bK$#C4EFg";
str = str.replace("$", "\\$");

Answer 2

try String.replace function that replace any sequence character :

    String str = "aLnx5$bK$#C4EFg";
    String newStr = str.replace("$","\\$");

Answer 3

you can write this to replace the $ with \\$

string newstring = str.replace("$", "\\$");

for more info see this java doc: string.replace