Replace alphabet in a string using replace?

Question

I\'m wondering if I can use string.replace() to replace all alphabets in a string?

String sentence = \"hello world! 722\"
String str = sentence         


        

Answer 1

You can use the following (regular expression):

    String test = "hello world! 722";
    System.out.println(test);
    String testNew = test.replaceAll("(\\p{Alpha})", "@");
    System.out.println(testNew);

You can read all about it in here: http://docs.oracle.com/javase/tutorial/essential/regex/index.html