java警告问题

Question

package test;
import java.util.*;
public class six_thirteen {

public static void main(String[] args) {
    
Scanner reader = new Scanner(System.in); 
    System.out.println("请输入你的年龄："); 
    int age = reader.nextInt();
    System.out.println(age);
        
}

}

请问一下大神现在有一个警告Resource leak: 'reader' is never closed，是什么原因？应该怎么改？

Answer 1

try{

System.out.println("请输入你的年龄："); int age = reader.nextInt(); System.out.println(age);

}finally

{

reader.close();

}