Trying to add text field below table in GUI in java

Question

The code I have currently works but only displays the table. I'm trying to add a text field below it but I'm not sure how I would do it. I'm also trying to set a listener on the text field and I'm not too sure how to do that either. Sorry if this is a dumb question, I'm not experienced in Java forms

public class table extends JFrame {
    JTable TestDB;
    public table(){
        setLayout(new FlowLayout());

        String[] columnNames={"First Name","Last Name","Address"};
        Object[][] data={{"Bob","Hazel","HelpMeDr"},{"Yo","Whattup","ezpz"}};

        TestDB=new JTable(data,columnNames);
        TestDB.setPreferredScrollableViewportSize(new Dimension(500,50));
        TestDB.setFillsViewportHeight(true);

        JScrollPane scrollPane=new JScrollPane(TestDB);
        add(scrollPane);
    }
}

score 2 · Answer 1 · answered Apr 25 '19 at 01:38

You can add a text field using the next code

textField = new JTextField(20);

//add a listener 
textField.addActionListener(this);

Now for make something happend after interact with the text field you need to make a method

public void actionPerformed(ActionEvent evt) {
    //do this when action performed at the textfield
}

I recommend you to visit the next website for more information https://docs.oracle.com/javase/tutorial/uiswing/components/textfield.html

score 0 · Answer 2 · answered Apr 26 '19 at 01:10

fist of all

do not extend JFrame here is why you should not
set a listener on the text field you don't !! you add a listener , huge difference . @P Dev answer is clear and neat in the listener matter.
do not use add directly with the frame object instead use getContentPane().add and the same goes on with the setLayout method because you don't really use it on the frame it self and it might crash your application in many cases . see when should I use JFrame.add(component) and JFrame.getContentPane().add(component) in java

last thing , in simple words , the FlowLayout is meant to be used only when you are aligning your components in horizontally as if it's a text in lines .

instead use another layout like BoxLayout like this

    public Table() {
        getContentPane().setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));

        String[] columnNames = {"First Name", "Last Name", "Address"};
        Object[][] data = {{"Bob", "Hazel", "HelpMeDr"}, {"Yo", "Whattup", "ezpz"}};

        TestDB = new JTable(data, columnNames);
        TestDB.setPreferredScrollableViewportSize(new Dimension(500, 50));
        TestDB.setFillsViewportHeight(true);

        JScrollPane scrollPane = new JScrollPane(TestDB);
        getContentPane().add(scrollPane);
        JTextField textField = new JTextField();
        getContentPane().add(textField);
    }

and one last thing is that text components have not less than 10 types of listener you have to use the one that fit your needs,our friend' answer(which i upvoted ) suggested that you will use ActionListener which it will be invoked every time the user hit 'Enter' in the text field . see How to Use BoxLayout for better understanding of the layout matter and happy coding ^-^.

Trying to add text field below table in GUI in java

2 Answers2