SWT Java Tutorial

A shell is always displayed in one of the following states: Normal, Maximized, Minimized.
To minimize a shell, you can use the following method:

public void setMinimized(boolean minimized)

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class ShellStates {
  public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display,SWT.SHELL_TRIM);
    shell.setLayout(new FillLayout());
    
    shell.setMinimized(true);
    shell.open();
    // Set up the event loop.
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        // If no more entries in event queue
        display.sleep();
      }
    }
    display.dispose();
  }
}
To check whether a shell is minimized or not, use:

public boolean getMinimized()
The counterparts methods for the maximized state are as follows:

public void setMaximized(boolean maximized)
     public boolean getMaximized()