The difference between next and nextline in the Java Sanner class

Next () differs from nextline () Next ():

1. Be sure to read the valid characters before you can end the input.

2. TheNext () method will automatically remove thewhitespace that is encountered before entering a valid character .

3. Enter only the valid characters before entering the blanks as delimiters or terminators.

Next () cannot get a string with a space.

Nextline ():

1 . Enter as the Terminator , meaning that the nextline () method returns all characters before the input carriage return.

2, you can get blank.

Example code:

import Java.util.Scanner;

Public class Scannertext {

Public Static void Main (string[] args) {

Scanner Scan=new Scanner (System. in);// receive data from the keyboard

int i=0;// defines an integer variable

float f=0.0f;// defines a floating-point variable

System. out. println (" input integer:");

if (Scan.hasnextint ()) {// determine if the input is an integer

I=scan.nextint ();// receive integer

System. out. println (" integer data:"+i);

}

Else {

Enter the wrong information

System. out. println (" input is not an integer! ");

}

Enter Decimal

System. out. println (" Enter decimal :");

if (Scan.hasnextfloat ()) {// determine if the input is a decimal

F=scan.nextfloat ();// Receive decimals

System. out. println (" decimal data is:"+f);

}

Else {

System. out. println (" the input is not a decimal!") ");

}

}

}

If you want to enter data of type int or float, it is also supported in the Scanner class, but it is best to use the Hasnextxxx () method for validation before entering, and then use NEXTXXX () to read , And more than two of the same

The difference between next and nextline in the Java Sanner class