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Java Java Arrays Iteration Review Looping over 2d arrays

Karel Schwab
Karel Schwab
12,955 Points
Posted by Karel Schwab
Karel Schwab
12,955 Points

Question about looping over 2D arrays

The question requires me to fill in the blanks. This is how I have it... What am I doing wrong?

char[][] boggle = { {'C', 'A', 'T'}, {'D', 'R', 'I'}, {'L', 'O', 'G'}};

System.out.printf("-------------%n"); for (int i = 0; i < boggle.length; i++) { for (int j = 0; j < boggle[0].length; j++) { System.out.printf("| %s ", boggle[i][j]); } System.out.printf("|%n-------------%n"); }

1 Answer

Yanuar Prakoso
Yanuar Prakoso
15,196 Points
Yanuar Prakoso
Yanuar Prakoso
15,196 Points

Hi Karel

If you look your code you made mistake on the second for loops: 

char[][] boggle = { {'C', 'A', 'T'}, {'D', 'R', 'I'}, {'L', 'O', 'G'}};

System.out.printf("-------------%n"); for (int i = 0; i < boggle.length; i++) 
{ for (int j = 0; j < boggle[0].length/*<--here is the problem*/  ; j++) 
{ System.out.printf("| %s ", boggle[i][j]); } System.out.printf("|%n-------------%n"); }

The j upper limit step is not j < boggle[0].length but it should be j < boggie[i].length like this:

char[][] boggle = { {'C', 'A', 'T'}, {'D', 'R', 'I'}, {'L', 'O', 'G'}};

System.out.printf("-------------%n"); for (int i = 0; i < boggle.length; i++) 
{ for (int j = 0; j < boggle[i].length; j++) 
{ System.out.printf("| %s ", boggle[i][j]); } System.out.printf("|%n-------------%n"); }

I hope this can help.

Karel Schwab
Karel Schwab
12,955 Points
Karel Schwab
Karel Schwab
12,955 Points

Thank you very much.