java算法训练 Interval

//算法训练 Interval
package lanqiaobei;
import java.util.Scanner;
public class Main10
{
public static void main(String args[])
{
Scanner scanner=new Scanner(System.in);
int n=scanner.nextInt();
int m=scanner.nextInt();
int[][] arr=new int[n][m];
int sum=0;
for(int i=0;i{
for(int j=0;j{
arr[i][j]=scanner.nextInt();
}
}
scanner.close();
for(int i=0;i{
for(int j=0;j{
sum=sum+arr[i][j];
}
   }
System.out.println(sum);
   }
}
代码运行结果截图：