Given a string, determine if it is an integer. For example the string "123" is an integer, but the string “hello" is not. It is an integer if all of the characters in the string are digits. Return true if it is an integer, or false if it is not. Hint: There is a method Character.isDigit() that takes a char as an argument and returns a boolean value.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Given a string, determine if it is an integer. For example the
string "123" is an integer, but the string “hello" is not.
It is an integer if all of the characters in the string are digits.
Return true if it is an integer, or false if it is not.
Hint: There is a method Character.isDigit() that takes a char as an
argument
and returns a boolean value.
Transcribed Image Text:Given a string, determine if it is an integer. For example the string "123" is an integer, but the string “hello" is not. It is an integer if all of the characters in the string are digits. Return true if it is an integer, or false if it is not. Hint: There is a method Character.isDigit() that takes a char as an argument and returns a boolean value.
3.6.5: Is it an Integer?
þublic boolean isInteger (String str)
2- {
3
4 }
Transcribed Image Text:3.6.5: Is it an Integer? þublic boolean isInteger (String str) 2- { 3 4 }
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