string replace in java regex code example

Example 1: java replace character

// We want to replace every # with a 8
String larry = "Larry is # years old";
String newString = larry.replace("#", "8");

Example 2: how to replace in java

String s1 = "my name is khan and my name is java";
String replaceString = s1.replace("is","was");
//replaces all occurrences of "is" to "was"
System.out.println(replaceString);