Java gui Jbutton

Question

I have a program but I can't combine the textfield and the button in the same frame like in top textfield and below that the button:

Here is my source code:

import java.awt.*;
import javax.swing.*;
public class FirstGui extends JFrame
{
     JTextField texts;
 JButton button;   

    public FirstGui()
    {
        texts = new JTextField(15);
        add(texts);
        button = new JButton("Ok");
        add(button);

    }
    public static void main(String args [])
    {
        FirstGui gui = new FirstGui();
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.setSize(200,125);
        gui.setVisible(true);

    }
}

see: docs.oracle.com/javase/tutorial/uiswing/layout/visual.html — pedromss
– pedromss, Commented Feb 8, 2014 at 10:58
It is always a good idea to state what you expect to happen and what actually happens. Far better than "I can't" or "doesn't work". — Behe
– Behe, Commented Feb 8, 2014 at 11:39

Martin Dinov · Accepted Answer · 2014-02-08 11:04:05Z

2

Add a layout like FlowLayout:

public FirstGui()
{
    setLayout(new FlowLayout());
    texts = new JTextField(15);
    add(texts);
    button = new JButton("Ok");
    add(button);

}

at the very beginning of your constructor, before anything else.

edited Feb 8, 2014 at 11:04

answered Feb 8, 2014 at 10:58

Martin Dinov

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3 Comments

Batusai Over a year ago

i already tried it but the error is java.lang.error: do not use FirstGui.setLayout() use FirstGui.getContentPane().setLayout()instead

Martin Dinov Over a year ago

Don't do FirstGui.setLayout(), that can't work. FirstGui refers to the class, not an instance. Just write setLayout(new FlowLayout()), as it is.

Batusai Over a year ago

anything that can i try ?

Paul Samsotha · Accepted Answer · 2014-02-08 11:45:18Z

2

The default layout is BorderLayout for JFrame. When you add components to a BorderLayout, if you don't specify their BorderLayout position, like BorderLayout.SOUTH, the component will automatically be add to BorderLayout.CENTER. Bthe thing is though, each position can only have one component. So when you add texts it gets added to the CENTER. Then when you add button, it gets added to the CENTER but texts gets kicked out. So to fix, you can do

add(texts, BorderLayout.NORTH);
add(button, BorderLayout.CENTER);

See Laying out Components Within a Container to learn more about layout managers.

UPDATE

import java.awt.*;
import javax.swing.*;

public class FirstGui extends JFrame {

    JTextField texts;
    JButton button;

    public FirstGui() {
        texts = new JTextField(15);
        add(texts, BorderLayout.CENTER);
        button = new JButton("Ok");
        add(button, BorderLayout.SOUTH);

    }

    public static void main(String args[]) {
        FirstGui gui = new FirstGui();
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        gui.pack();
        gui.setVisible(true);

    }
}

edited Feb 8, 2014 at 11:45

answered Feb 8, 2014 at 11:29

Paul Samsotha

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11 Comments

Batusai Over a year ago

same java.lang.Error :ccccccccccc

Paul Samsotha Over a year ago

I don't know what you're doing wrong then, it works fine for me.

Batusai Over a year ago

i know setLayout(new FlowLayout()); will work but ill get java.lang.error :((

Batusai Over a year ago

sir im using JCreator .

Paul Samsotha Over a year ago

Use an industry standard IDE like Netbeans or Eclipse. It's free to download

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