"java". String toUpperCase () returns a copy of the string. The intermediate result String a.toUpperCase () is not stored anywhere, therefore in the output we get a string from the variable a = "java" ...

Question: Why StringBuffer and StringBuilder classes are introduced in java when there already exist String class to represent the set of characters? The objects of String class are immutable in ...

The characters in a string have indices that run from 0 to string.length() - 1. The method charAt() returns the character at a specified index. The boolean operator ( == ) returns true only if the two ...

The characters in a string have indices that run from 0 to string.length() - 1. The method charAt() returns the character at a specified index. The boolean operator ( == ) returns true only if the two ...