java中“Resource leak: ‘XXX‘ is never closed”警告问题

在接收数据后添加sc.close();

或者写在main函数最后

import java.util.Scanner;
public class ShuRu {
	public static void main(String[] arg) {
		System.out.println("Please Input x:");
		//创建对象
		Scanner sc = new Scanner(System.in);
		//接收数据		
		int x=sc.nextInt();	
		//输出数据
		System.out.println("x:"+x);
		sc.close();
	}
}

import java.util.Scanner;
public class ShuRu {
	public static void main(String[] arg) {
		System.out.println("Please Input x:");
		//创建对象
		Scanner sc = new Scanner(System.in);
		//接收数据		
		int x=sc.nextInt();	
		//输出数据
		sc.close();
		System.out.println("x:"+x);
	}
}