如何使用Array和if else语句？

Question

我有这样的代码：

String[] sweetFlevors = { "Caramel", "Cinnamon", "Wetermelon", "Backed Beans" }; 

String[] savoryFlavors = { "Sea Salt", "Potato Chip", "Carrot", "Barbque" }; 

int[] numberRows = { 1, 2, 3, 4 }; 
int[] numberCol = { 1, 2 }; 

for (int col = 0; col < numberCol.length; col++) { 
    System.out.println("  " + numberCol[0] + "   " + numberCol[1]); 

    for (String sweet: sweetFlevors) { 
     for (String savory: savoryFlavors) { 

      for (int row = 0; row < numberRows.length; row++) { 
       System.out.print(numberRows[row] + ". "); 

       System.out.println(sweet + " and " + savory); 
      } 
     } 
    } 
} 

和我的输出是这样的：

1   2 
1. Caramel and Sea Salt 
2. Caramel and Sea Salt 
3. Caramel and Sea Salt 
2. Wetermelon and Carrot 
3. Backed Beans and Barbque 
4. Backed Beans and Barbque 
     1   2  // How to delete this line? 
1. Caramel and Sea Salt 
2. Caramel and Sea Salt 

我不知道我怎么可以删除第二行列？为什么我得到它？

感谢你帮我:)

Answer 1

你两次打印的列标题，因为你已经把它的for循环for (int col = 0; col < numberCol.length; col++)内。你必须这样做：

String[] sweetFlevors = { "Caramel", "Cinnamon", "Wetermelon", "Backed Beans" }; 

String[] savoryFlavors = { "Sea Salt", "Potato Chip", "Carrot", "Barbque" }; 

int[] numberRows = { 1, 2, 3, 4 }; 
int[] numberCol = { 1, 2 }; 

System.out.println("  " + numberCol[0] + "   " + numberCol[1]); 
for (int col = 0; col < numberCol.length; col++) { 
    for (String sweet: sweetFlevors) { 
     for (String savory: savoryFlavors) { 
      for (int row = 0; row < numberRows.length; row++) { 
       System.out.print(numberRows[row] + ". "); 

       System.out.println(sweet + " and " + savory); 
      } 
     } 
    } 
}