char c=s1.charAt(5);/*returns the char value at the 2th index of string "welcome to java programming" */ System.out.println("returning the char value at the 5th index of string s1= "+c); ...

A Java string is a sequence of characters that exists as an object ... 9); System.out.println(x) } } The classes and StringBuffer() are similar, however StringBuilder() is newer and not thread-safe, ...

We know that Strings are immutable or constants but String builder and String buffer are basically used to provide dynamic implementation of Strings. But String Builder is not thread safe that means ...

A String object is immutable. A StringBuffer object is like a String object but can be modified. A string buffer is a sequence of characters but the length and content of the sequence can be changed ...