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import java.util.*;
class csdn {
public static void main(String args) {
Scanner sc = new Scanner(System.in);
System.out.println("please input a data:");
String data = sc.nextLine();
System.out.printf("the data you input is %s\n", data);
}
}
import java.util.*;
class csdn {
public static void main(String args) {
if (System.getProperty("_DEBUG") != null) { //通过判断系统属性来修改输入重定向
System.setIn(new FileInputStream("data.txt")); //事先准备好输入数据的文件
}
Scanner sc = new Scanner(System.in);
System.out.println("please input a data:");
String data = sc.nextLine();
System.out.printf("the data you input is %s\n", data);
}
}