* Constructor. Sets PObject to RCL.
* @param applet The <em>controller</em> object.
*/
public RCLButton( CalculatorApplet applet ){
this.applet = applet;
this.pobject = new RCL();
setText();
setTextSize();
tooltip = "use to recall the value in memory";
shortcut = 'R';
setToolTipText();