Java Graph

I'm trying to make a graph to put into a JPanel or JFrame, but my coordinates are huge. The range on my x-axis are 0 - 1024 and the y axis range is 0 - 300.
I plotted it using a polyline, but that was a fucking disaster. How do you graph coordinates and then modify the graph to keep the points relative (so I could have a graph that's 500px X 500px that has 1024 points)?

>>5
Then make it not take up a pixel. Or use the magic powers that come with your computer and let the user zoom in and out