TLDR; The existing String concatenation options are difficult to work with and could be error prone.String Templates(a preview feature introduced in Java 21) greatly improves how we create strings in Java by merging constant strings with variable values. The name of this feature pretty much says ...
When we change the str1 characters, the changes will be reflected to str2. Because both str1 and str2 variables are referring the same memory location. For avoiding this we are keeping String as immutable. However we can use StringBuffer if you want to do modifications in the string. From...