Thread: Help merging program code with GUI code

I made a quadratic formula solver, and built the GUI using WindowsBuilder Pro in Eclipse, I want to know how do i merge my code with the gui so that when i press buttons they do what i want.

** I also dont know how to add a display widget, in which there is a screen to display user input (check comments)

Thanks Guys

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.SWT;
import java.util.Scanner;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
 
class Quad {
	public static void main(String args[]) {
		Scanner key = new Scanner(System.in);
 
		//need to make three screens to display user input
 
		System.out.print("Enter a: ");double a = key.nextDouble();
		System.out.print("Enter b: ");double b = key.nextDouble();
		System.out.print("Enter c: ");double c = key.nextDouble();
 
		System.out.println("");
 
		double x = 0; x =(-b + Math.sqrt(b*b - (4 * a * c)))/ (2 * a);
		double y = 0; y = (-b - Math.sqrt(b*b - (4 * a * c)))/ (2 * a);
 
		//need to make two screens to display both outputs
 
		System.out.println("x1= " + x);
		System.out.println("x2= " + y);
	}
}
public class QuadraticWindow {
 
	/**
	 * Launch the application.
	 * @param args
	 */
	public static void main(String[] args) {
		Display display = Display.getDefault();
		Shell shlQuadraticApp = new Shell();
		shlQuadraticApp.setSize(450, 300);
		shlQuadraticApp.setText("Quadratic App");
 
		Button btnCalculate = new Button(shlQuadraticApp, SWT.NONE);
		btnCalculate.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
			}
		});
		btnCalculate.setBounds(183, 126, 68, 23);
		btnCalculate.setText("Calculate");
 
		Button button = new Button(shlQuadraticApp, SWT.NONE);
		button.addSelectionListener(new SelectionAdapter() {
 
		});
		button.setBounds(10, 89, 29, 23);
		button.setText("1");
 
		Button button_1 = new Button(shlQuadraticApp, SWT.NONE);
		button_1.setText("4");
		button_1.setBounds(10, 118, 29, 23);
 
		Button button_2 = new Button(shlQuadraticApp, SWT.NONE);
		button_2.setText("7");
		button_2.setBounds(10, 147, 29, 23);
 
		Button button_3 = new Button(shlQuadraticApp, SWT.NONE);
		button_3.setText("8");
		button_3.setBounds(45, 147, 29, 23);
 
		Button button_4 = new Button(shlQuadraticApp, SWT.NONE);
		button_4.setText("5");
		button_4.setBounds(45, 118, 29, 23);
 
		Button button_5 = new Button(shlQuadraticApp, SWT.NONE);
		button_5.setText("2");
		button_5.setBounds(45, 89, 29, 23);
 
		Button button_6 = new Button(shlQuadraticApp, SWT.NONE);
		button_6.setText("3");
		button_6.setBounds(80, 89, 29, 23);
 
		Button button_7 = new Button(shlQuadraticApp, SWT.NONE);
		button_7.setText("6");
		button_7.setBounds(80, 118, 29, 23);
 
		Button button_8 = new Button(shlQuadraticApp, SWT.NONE);
		button_8.setText("9");
		button_8.setBounds(80, 147, 29, 23);
 
		shlQuadraticApp.open();
		shlQuadraticApp.layout();
		while (!shlQuadraticApp.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
	}
}

First, separate your files into two classes. Secondly, using the other class - not the main method, define a Handler class and link it to your members in the same class. Making the inner class private is advisable. If you have not used inner classes, check out some tutorials. Within that private inner class, define your method to handle whatever you want and remember to add stuff to the frame. Read more! good luck

Thanks ill look it up