Java-scanner input

Java read data-call Scanner class

The first step is to call the scanner class:

Scanner reader=new Scanner (system.in);

Second step, enter:
int A=reader.nextint (); Input integer number (cannot enter a space)
Double b=reader.nextdouble ();//Input doubles (cannot enter a space)
String S1=reader.next (); Input string type (cannot enter a space)
String line=reader.nextline ();//Enter an entire line, in the middle can have spaces and other whitespace characters
Char C=reader.next (). charAt (0); Enter a character type (you cannot enter a space)

Note:

If there is more than one set of data, an indeterminate number can be used
while (Reader.hasnextdouble ()) {

}
Other as while (Reader.hasnextint ()) {

}
while (Reader.hasnext ()) {

}
while (Reader.hasnextline ()) {
}

Java-scanner input