Write a Java program to enter any sentence and convert the sentence to uppercase. Print only those words of the sentence whose first and last letters are the same.

The following code to compare two strings is compiled, the following syntax error was displayed – incompatible types – int cannot be converted to boolean.

Identify the statement which has the error and write the correct statement. Give the output of the program segment.

void calculate()
{
String a = "KING", b = "KINGDOM";
boolean x = a.compareTo(b);
System.out.println(x);
}

Define a class to accept the gmail id and check for its validity.

A gmail id is valid only if it has:

→ @

→ .(dot)

→ gmail

→ com

Example: icse2024@gmail.com is a valid gmail id