15. Common properties and methods for controls

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      // Managing text
      getText()
      setText( String )
  
      // Enable text editing
      setEditable( boolean )        // whether user can edit the text
      selectAll()
  
      // Enable user interaction with the control
      setEnabled( boolean )         // if enabled, it may respond to user input
  
      // Enable control to receive focus on the form
      requestFocusInWindow()        // set focus
      setFocusable( boolean )       // enable to receive focus
  
      // Set horizontal alignment for the text
      // JTextField.LEFT, CENTER, RIGHT, LEADING, TRAILING
      setHorizontalAlignment( int )
      getHorizontalAlignment()