Maximizes a frame; the iconified bit is not affected : JFrame States « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JFrame States

import java.awt.Frame;

public class Main {
  public static void main(String[] argv) throws Exception {
    Frame frame = new Frame();

    frame.setSize(300, 300);
    frame.setVisible(true);

    minimize(frame);
  }

  public static void minimize(Frame frame) {
    int state = frame.getExtendedState();

    // Clear the maximized bits
    state &= ~Frame.MAXIMIZED_BOTH;

    // Maximize the frame
    frame.setExtendedState(state);
  }
}