A grid to help line things up when using graphics in Java

grid.java

// Paste inside public void paint()
g.setColor(Color.black);
g.setFont(new Font(null));
for ( int X=0; X<800; X += 50 )
    g.drawString( String.valueOf(X), X, 50 );
for ( int Y=100; Y<600; Y += 50 )
    g.drawString( String.valueOf(Y), 28, Y );
// lines
g.setColor(Color.lightGray);
for ( int X=0; X<800; X += 50 )
    g.drawLine(X,0,X,599);    // horizontal
for ( int Y=0; Y<600; Y += 50 )
    g.drawLine(0,Y,799,Y);    // vertical