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

class test extends JFrame {
	public test(){
		super("test");
		setLayout(new FlowLayout(FlowLayout.LEFT));
		
				
		add(new testpanel());
		setSize(800, 600);
		setVisible(true);
	}

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

///////////////////////////////////////////////////////////////////////////////////////////


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

class testpanel extends JPanel{
	public testpanel(){
		super(new GridBagLayout());
		
		GridBagConstraints gbc = new GridBagConstraints();
		gbc.anchor = gbc.NORTH;
		
		JLabel foo = new JLabel("foo");
		foo.setOpaque(true);
		foo.setBackground(Color.RED);
		add(foo, gbc);
		
		setBorder(BorderFactory.createLineBorder(Color.BLACK));
		setPreferredSize(new Dimension(200,200));
		setVisible(true);
	}
}