Java二維數組計算集合總結，java二維數組集合

Java二維數組計算集合總結，java二維數組集合

public class CrossSum{   public static void main(String args[]){     int [][]a = {{1,2,3,4,5},         {6,7,8,9,10},         {11,12,13,14,15},         {16,17,18,19,20},         {21,22,23,24,25}} ;      int transverse =0; //橫    int vertical =0; //豎     for(int i = 0; i < 5; i++){    transverse = transverse+ a[2][i]; //通過下標訪問     }     for(int j = 0; j < 5; j++){      vertical = vertical+ a[2][j];      }     System.out.println("5*5數組十字和為"+(transverse+vertical));    } } 

public class LeftSum{   public static void main(String args[]){     int [][]a = {{1,2,3,4,5},     {6,7,8,9,10},         {11,12,13,14,15},         {16,17,18,19,20},         {21,22,23,24,25}} ;      int sum =0;      for(int i = 0; i < 5; i++){        sum = sum+ a[i][i];      }       System.out.println("5*5數組="+sum);    } } 

public class RightSum{   public static void main(String args[]){     int [][]a = {{1,2,3,4,5},     {6,7,8,9,10},         {11,12,13,14,15},         {16,17,18,19,20},         {21,22,23,24,25}} ;      int sum =0;      for(int j = 4; j >=0; j--){      sum = sum+ a[j][j];          }         System.out.println("5*5數組="+sum);  } }