Iterating a Two Dimensional Array

[Steve Dyke]

This question has probably been asked many times but here goes.

I have a two dimensional array and I cannot figure out how to interate through it that makes any sense.

I have a for loop but how do I know how many elements will be in the array for my second arry parameter

for(int ma = 0;ma < mConn.getMatrixQuantityArray().length; ma++){
   String p1 = mConn.getMatrixQuantityArray()[ma][?];      				
}

[Rob Spoor]

You need a nested loop. This can be done using the traditional way, or with the for-each loop:

// traditional way
// keep a reference so you don't need to call the method each time
String[][] array = mConn.getMatrixQuantityArray();
for (int ma = 0; ma < array.length; ma++) {
    for (int mb = 0; mb < array[ma].length; mb++) {
        String p1 = array[ma][mb];
    }
}

// for-each loop:
for (String[] row: mConn.getMatrixQuantityArray()) {
    for (String p1: row) {
    }    
}

[Steve Dyke]

Rob Spoor wrote:You need a nested loop. This can be done using the traditional way, or with the for-each loop:

// traditional way
// keep a reference so you don't need to call the method each time
String[][] array = mConn.getMatrixQuantityArray();
for (int ma = 0; ma < array.length; ma++) {
    for (int mb = 0; mb < array[ma].length; mb++) {
        String p1 = array[ma][mb];
    }
}

// for-each loop:
for (String[] row: mConn.getMatrixQuantityArray()) {
    for (String p1: row) {
    }    
}

Thanks.

[fred rosenberger]

point to remember - you don't have a two-dimensional array. You have a one dimensional array that hold items. those item happen to be...arrays.

Each element in your first array can be a different size - what is called a 'ragged array'.