How to remove characters from string code example

Example 1: remove from string python

"Str*ing With Chars I! don't want".replace('!','').replace('*','')

Example 2: how to delete character in string java

# subString(int start, int end);

String a = "Hello!";
b = a.subString(0,a.length()-1) #Remove the last String
# b should be "Hello" then