java theory

Question 22

What is toLowerCase();

Ans

It convert upper case into lower case.

 Question 23

Give  example of  toLowerCase()

Ans

Example      Charater.toLowerCase(P)   it returns  p

Question 24

What is trim()

Ans

The void space is removed from both sides using trim().

Question 25

Give example of trim()

Ans

It "\t Good Night \n".trim() returns a new string Good Night.

Question 26

What is length()

Ans

It is used to calculate to number of character in a string

Question 27

Give example of  length

Ans

String d=”This is my book and”,

System.out.println(d.length());    it returns 19

Question 28

What is indexOf()

Ans

It is used to check the index number of character

 Question 29

Give example indexOf()

Ans

"Welcome to Java".indexOf('o') returns 4.