Nested loops

boolean[][] values = {{false, false}, {false, false}, {true,false}};

// option a: normal for loop
for(int i=0; i<values.length; i++) {
    for(int j=0; j<values[i].length; j++) {
        if(values[i][j]) System.out.println(i+“/„+j+“ is true“);
    }
}

// option b: foreach loop 
for(boolean[] row : values) {
    for(boolean value : row) {
        if(value) System.out.println(“A value is true“);
    }
}

for (int y=0; y<8; y++) // for each row
{
    for (int x=0; x<8; x++) // for each square in row
    { // color square
        colorSquare(x, y, (new Color[] { Color.WHITE, Color.BLACK })[(x+y)%2]); // method not given
    }
}

for (int i=1; i<array.length; i++) // for all but first value
{
    int n=i;
    while (n>0 && array[n] < array[n-1]) // while value is swap-able and needs swapped
    { // push forward
        swap(array, n-1, n); // method not given
        n--;
    }
}

List sms = getObjects(SmoothMover.class);
for (int j=0; j<sms.size()-1; j++) // for each listed mover
{
    SmoothMover smA = (SmoothMover)sms.get(j);
    for (int i=j+1; i<sms.size(); i++) // and for each subsequent mover
    {
        SmoothMover smB = (SmoothMover)sms.get(i);
        smA.applyGravity(smB); // apply force of one on another
        smB.applyGravity(smA); // and apply force of the other on the one
    }
}