Setting the Bounds for a Maximized Frame : JFrame States « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JFrame States

import java.awt.Frame;
import java.awt.Rectangle;

public class Main {
  public static void main() {

    Frame frame = new Frame();

    Rectangle bounds = new Rectangle(20, 20, 200, 200);

    frame.setMaximizedBounds(bounds);
    frame.setVisible(true);
  }
}