Java 2d 数组列打印两次

Question

您好，我的二维数组列打印了两次。请帮我识别错误的代码。以下是我尝试过的:

public class ArrayExercise {
public static void main(String[] args){


    String[][] myArray = {
        {"Philippines", "South Korea", "Japan", "Israel"}, // Countries
        {"Manila", "Seoul", "Tokyo", "Jerusalem" } // capital cities
    };

    String outputString = String.format("%16s\t%9s", "Country", "City" );
    System.out.println(outputString);

    for( int col = 0; col < myArray[0].length; ++col ){
        for( int row = 0; row < myArray.length; ++row ){  
           System.out.printf( "%16s\t%9s", myArray[0][col], myArray[1][col]  );
        }         
        System.out.println();         
    }
  }

}

这让我抓狂，我似乎找不到错误:(

Answer 1

在内部循环中，您将打印两行: - myArray[0][col], myArray[1][col]

然后你使用内部循环迭代该事物两次:-

    for( int row = 0; row < myArray.length; ++row ){  
       System.out.printf( "%16s\t%9s", myArray[0][col], myArray[1][col]  );
    } 

您需要删除此内部循环:-

for( int col = 0; col < myArray[0].length; ++col ){

    System.out.printf( "%16s\t%9s", myArray[0][col], myArray[1][col]  );

    System.out.println();         
}