import java.util.*;
public class ScannerTest {
public static void main(String[] args){
Scanner scanner=new Scanner(System.in);
String s=scanner.nextDouble();
System.out.println(s); } }
import java.util.*;
public class ScannerTest {
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
String str=sc.nextLine();
System.out.println(str);
}
}
ScannerTest-------double string
原文：http://www.cnblogs.com/fantasy12436109/p/3976996.html