Scanner doesn't read whole sentence - difference between next() and nextLine() of scanner class

Question

I\'m writing a program which allows the user to input his data then outputs it. Its 3/4 correct but when it arrives at outputting the address it only prints a word lets say

Answer 1

next() will only store the input up to the first token. if there are two words "Hi there" it means there are two tokens separated by space (delimiter). Every time you call the next() method it reads only one token.

if input is "Hi there !"

Scanner scan = new Scanner(System.in);
String str = scan.next()
System.out.println(str);

Output

Hi

So if you both the words you need to call next() again to get the next token which is inefficient for longer string input

nextLine() on the other hand grabs the entire line that the user enters even with spaces

Scanner scan = new Scanner(System.in);
String str = scan.nextLine()
System.out.println(str);

Output

Hi there !