iS9LTZxW

Layouts in java Swing specifying size
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import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JComponent;
import javax.swing.JPanel;

public class FixedSizeComponent extends JPanel {
    private Dimension size;
    private final JComponent content;

    public FixedSizeComponent(JComponent content) {
        super(new BorderLayout());
        this.content = content;
        super.add(content, BorderLayout.CENTER);
    }

    @Override
    public void setSize(Dimension d) {
        size = d;
    }

    @Override
    public void setSize(int width, int height) {
        size = new Dimension(width, height);
    }

    @Override
    public Dimension getSize() {
        if (size != null) return size;
        return content.getSize();
    }

    @Override
    public Dimension getSize(Dimension rv) {
        if (size != null) {
            if (rv == null) rv = new Dimension();
            rv.height = size.height;
            rv.width = size.width;
            return rv;
        }
        return content.getSize(rv);
    }

    @Override
    public Dimension getPreferredSize() {
        if (size != null) return size;
        return content.getPreferredSize();
    }

    @Override
    public Dimension getMaximumSize() {
        if (size != null) return size;
        return content.getMaximumSize();
    }

    @Override
    public Dimension getMinimumSize() {
        if (size != null) return size;
        return content.getMinimumSize();
    }
}