多次元配列で0を含むCOLUMNSの量を計算する方法

Question

多次元配列でゼロを含むCOLUMNSの量を計算する方法。 0を含む行の数を計算できましたが、列の量を計算する方法を理解できません。助けてください。

public class Main { 
    public static void main (String[] args) { 
     int i; 
     int j; 
     int count = 0; 
     int [][] arr = {{3, 0, 0, 6}, {4, 0, 1, 1}}; 
     for (i = 0; i < arr.length; i++) { 
      System.out.println(); 
      for (j = 0; j < arr[i].length; j++){ 
       System.out.print(arr[i][j] + ", "); 
      } 
     } 
     System.out.println(); 
     //----------------------------------------------------------- 
     for (i = 0; i<arr.length; i++) { 
      for (j = 0; j<arr[i].length; j++) { 
       if (arr[i][j] == 0) { 
        count++; 
        break; 
       } 
      } 
     } 
     System.out.println("the amount of rows containing zeros = " + count); 
    } 
} 

Answer 1

sqaure行列のために同じ結果を得るためのもう一つの簡単な方法は：

import java.util.*; 
import java.lang.*; 
import java.io.*; 

/* Name of the class has to be "Main" only if the class is public. */ 
class Ideone 
{ 
    public static void main (String[] args) throws java.lang.Exception 
    { 
     int i; 
     int j; 
     int count = 0; 
     int [][] arr = {{3, 0, 0, 6}, {4, 0, 1, 0}}; 

     for (i = 0; i < arr.length; i++) 
     { 
      System.out.println(); 
      for (j = 0; j < arr[i].length; j++) 
      { 
       System.out.print(arr[i][j] + ", ");} } 
       System.out.println(); 
      //-------------------------------------------------------------------- 

      for (i = 0; i<arr.length; i++) 
       for (j = 0; j<arr[i].length; j++) 
        if (arr[i][j] == 0) 
        { 
         count++; 
         break; 
        } 
      System.out.println("the amount of rows containing zeros = " + count); 

      //-------------------------------------------------------------------- 
      count=0; 

      for (i = 0; i<arr[0].length; i++) 
       for (j = 0; j<arr.length; j++) 
        if (arr[j][i] == 0) 
        { 
         count++; 
         break; 
        } 
      System.out.println("the amount of cols containing zeros = " + count); 
    } 
} 

出力：

3, 0, 0, 6, 
4, 0, 1, 0, 
the amount of rows containing zeros = 2 
the amount of cols containing zeros = 3 

http://ideone.com/VE0qAw