java change string character code example
Example 1: java replace character
String larry = "Larry is # years old";
String newString = larry.replace("#", "8");
Example 2: java string replace character at position
String str = in.nextLine();
char cr = in.next().charAt(0);
int index = in.nextInt();
str = str.substring(0, index) + cr + str.substring(index + 1);
Example 3: java replace character in string
String s = "new String";
String replaced = s.replace("new","Test");
^ ^
old new char
Example 4: java replaceall single character
.replaceAll("(?<!\\S)[^ ](?!\\S)", " ").trim()