import java
.util
.Scanner
;
通过以下语句建立输入对象并实现输入功能
Scanner scanner
= new Scanner(System
.in
);
int contents
= scanner
.nextInt();
Long contents
= scanner
.nextLong();
Double contents
= scanner
.nextDouble();
char content
= scanner
.next().charAt(0);
String contents
= scanner
.nextLine();
String contents
= scanner
.next();
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