Showing an array in a GUI

Question

I've been doing a program with the Bubblesort algorithm. I have made a GUI with the algorithm, but my ending array with the number from smallest to biggest do not seem to appear, the only thing that appears is the last (and biggest) number. I know the algorithm is right because I did some testing using System.out.print to check if it's right and it is. I'm using a JTextArea and my code is as follows:

JButton button = new JButton("Berechnen");
JTextField z1 = new JTextField();
JTextField z2 = new JTextField();
JTextField z3 = new JTextField();
JTextField z4 = new JTextField();

JLabel n1 = new JLabel("Erste Zahl");
JLabel n2 = new JLabel("Zweite Zahl");
JLabel n3 = new JLabel("Dritte Zahl");
JLabel n4 = new JLabel("Vierte Zahl");
JTextArea res = new JTextArea("Ergebnis");

public static void main(String[] args) {

    new Sortieren();
}

public Sortieren() {

    this.setTitle("Bubblesort");
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setSize(400, 400);
    this.setLayout(null);
    this.setVisible(true);

    this.add(z1);
    z1.setBounds(150,10,120,20);
    this.add(z2);
    z2.setBounds(150,40,120,20);
    this.add(z3);
    z3.setBounds(150,70,120,20);
    this.add(z4);
    z4.setBounds(150,100,120,20);
    this.add(n1);
    n1.setBounds(10,10,120,20);
    this.add(n2);
    n2.setBounds(10,40,120,20);
    this.add(n3);
    n3.setBounds(10,70,120,20);
    this.add(n4);
    n4.setBounds(10,100,120,20);
    this.add(res);
    res.setBounds(10,130,200,20);
    this.add(button);
    button.setBounds(70,160,100,20);

    button.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {

            String text1= z1.getText();
            String text2= z2.getText();
            String text3= z3.getText();
            String text4= z4.getText();

            int behaelter = 0;
            int zahl1 = Integer.parseInt(text1);
            int zahl2 = Integer.parseInt(text2);
            int zahl3 = Integer.parseInt(text3);
            int zahl4 = Integer.parseInt(text4);

            int[] sort = {zahl1, zahl2, zahl3, zahl4};

            for (int i = 0; i < sort.length; i++) {
                for (int j = 1; j < (sort.length - i); j++) {
                    if (sort[j - 1] > sort[j]) {
                        behaelter = sort[j - 1];
                        sort[j - 1] = sort[j];
                        sort[j] = behaelter;

                    }

                }
            }

            for (int i = 0; i < sort.length; i++) {
                System.out.print(sort[i]+" ");
                res.setText(String.valueOf(sort[i]+" "));
            }

        }

    });



}

@Override
public void actionPerformed(ActionEvent e) {
    throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}

Java GUIs have to work on different OS', screen size, screen resolution etc. using different PLAFs in different locales. As such, they are not conducive to pixel perfect layout. Instead use layout managers, or [combinations of them](http://stackoverflow.com/a/5630271/418556) along with layout padding and borders for [white space](http://stackoverflow.com/a/17874718/418556). — Andrew Thompson, Feb 07 '18 at 00:51

score 3 · Answer 1 · answered Feb 06 '18 at 18:40

I think you should use append

for (int i = 0; i < sort.length; i++) 
     res.append(sort[i]);

Or another solution should be saving it into String:

String result = "";
for (int i = 0; i < sort.length; i++) 
     result += Integer.toString(sort[i]) + " ";

and then set text to res

res.setText(result);

Showing an array in a GUI

1 Answers1