How can I set the insets of a JFrame?

问题

Is there a way to set the insets of a JFrame? I tried

frame.getContentPane().getInsets().set(10, 10, 10, 10);

and

frame.getInsets().set(10, 10, 10, 10);

but none of them seem to work.

回答1:

JPanel contentPanel = new JPanel();

Border padding = BorderFactory.createEmptyBorder(10, 10, 10, 10);

contentPanel.setBorder(padding);

yourFrame.setContentPane(contentPanel);

So basically, contentPanel is the main container of your frame.

回答2:

Overriding the Insets of JFrame would not be the soultion to your actual problem. To answer your question, you cannot set the Insets of JFrame. You should extend JFrame and override the getInsets method to give the insets you require.

回答3:

You have to create an Object of LayOutConstraint and set its Insets. Like in below example I have used GridBagLayout() and used GridBagConstraint() object.

    GridBagConstraints c = new GridBagConstraints();
    JPanel panel = new JPanel(new GridBagLayout());
    c.insets = new Insets(5, 5, 5, 5); // top, left, bottom, right
    c.anchor = GridBagConstraints.LINE_END;

    // Row 1
    c.gridx = 0;
    c.gridy = 0;
    c.anchor = GridBagConstraints.LINE_START;
    panel.add(isAlgoEnabledLabel, c);

回答4:

As this question does not have a definitive answer yet you can do it like basiljames said here. The correct way to do it would be to extend a JFrame and then override the getInsets() method.

For example

import javax.swing.JFrame;
import java.awt.Insets;

public class JFrameInsets extends JFrame {
    @Override
    public Insets getInsets() {
        return new Insets(10, 10, 10, 10);
    }

    private JFrameInsets()  {
        super("Insets of 10");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setMinimumSize(getSize());
        setVisible(true);
    }

    public static void main(String[] args) {
        new JFrameInsets();
    }
}