David's Weblog

This is a simple example of an ArrayList with a for loop and an iterator. It loads 3 values into the ArrayList and then prints the values out using a for loop and an iterator.

ArrayList<Integer> mIntList = new ArrayList<Integer>();

mIntList.add(1);
mIntList.add(2);
mIntList.add(3);

// This is a funny looking for loop because the 3rd parameter is not needed

// the next() statement inside the for loop increments the iterator
for(Iterator<Integer> mIterator = mIntList.iterator(); mIterator.hasNext();  /* none */)
{
     //incrementing the iterator occurs here
     System.out.println(“value = ” + mIterator.next().toString());
}

This is a simple example showing an array declaration, filling it up with data with a for loop and printing it out with a for, each loop.

int[] mIntArray;

mIntArray = new int[10];

// fill up the array with values that match the indexes
for(int i=0; i < mIntArray.length; i++ )
{
     mIntArray[i] = i + 1;
}


// print out the contents using a for each loop
for(int i : mIntArray)
{
     System.out.println(“value = ” + i);
}