public ShapeGUI() {

      // Configure GUI
      window.setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
      window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      
	// Add components to the container
      Container myContainer = window.getContentPane();
	
	// GridBagLayout configuration top to bottom
      myContainer.setLayout(gbl);
	
	// Line 1 in the GUI
	c.gridwidth = 3;
	c.gridy = 1; gbl.setConstraints(geometricAttr,c);
      	myContainer.add(geometricAttr);
	
	// Line 2 in the GUI
	c.gridwidth = 1;
	c.gridy = 2; c.gridx = 1;gbl.setConstraints(rHeight,c);
      c.gridx = 2; gbl.setConstraints(rWidth,c);
      c.gridx = 3; gbl.setConstraints(rButton,c);
	myContainer.add(rHeight);
      	myContainer.add(rWidth);
    	myContainer.add(rButton);

	// Line 3 in the GUI
	c.gridy = 3; c.gridx = 2; gbl.setConstraints(sEdge,c);
      c.gridx = 3; gbl.setConstraints(sButton,c);
	myContainer.add(sEdge);
    	myContainer.add(sButton);
      	
	// Line 4 in the GUI
	c.gridy = 4;c.gridx = 2; gbl.setConstraints(cRadius,c);
      c.gridx = 3; gbl.setConstraints(cButton,c);
	myContainer.add(cRadius);
    	myContainer.add(cButton);
     
	// Line 5 in the GUI
	c.gridy = 5; c.gridx = 1; gbl.setConstraints(eLongRadius,c);
	c.gridx = 2; gbl.setConstraints(eShortRadius,c);
      c.gridx = 3; gbl.setConstraints(eButton,c);
	myContainer.add(eLongRadius);
	myContainer.add(eShortRadius);
    	myContainer.add(eButton);

	// Line 6 in the GUI
	c.gridy = 6; c.gridx = 0; gbl.setConstraints(tEdgeA,c);
	c.gridx = 1; gbl.setConstraints(tEdgeB,c);
      c.gridx = 2; gbl.setConstraints(tEdgeC,c);
	c.gridx = 3; gbl.setConstraints(tButton,c);
	myContainer.add(tEdgeA);
      myContainer.add(tEdgeB);
	myContainer.add(tEdgeC);
      myContainer.add(tButton);	

	// Line 7 in the GUI
	c.gridy = 7; gbl.setConstraints(separator1,c);
	myContainer.add(separator1);	
	
	// Line 8 in the GUI
      c.gridy = 8; c.gridwidth = 3; 
      c.gridx = 0; gbl.setConstraints(computeButton,c);
	c.gridx = 3; gbl.setConstraints(elemVector,c);
	c.gridx = 4; gbl.setConstraints(vectorSize,c);
	myContainer.add(computeButton);	
	myContainer.add(elemVector);	
	myContainer.add(vectorSize);	

	// Line 9 in the GUI
	c.gridy = 9; gbl.setConstraints(separator2,c);
	myContainer.add(separator2);	

	// Line 10 in the GUI
	c.gridy =10; c.gridwidth = 4; 
	c.gridx = 0; gbl.setConstraints(resultsArea,c);
	myContainer.add(resultsArea);

   	//Display GUI
      window.show();
	// Register Actions-Buttons
	actions();
   }