GUI小程序【GridBagLayout】

自己做练习编写的小程序：GridBagLayout布局使用
下面是自己写的代码

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

public class ShowGridBagLayout extends JApplet{
private JLabel jbl1=new JLabel("resize the window and study gridbaglayout",JLabel.CENTER);
    private JTextArea jta1=new JTextArea("jtextarea1",5,15);
    private JTextArea jta2=new JTextArea("jtextarea2",5,15);
    private JTextField jtf=new JTextField("JTextField");
    private JPanel jp=new JPanel();
    private JButton jbt1=new JButton("jbutton1");
    private JButton jbt2=new JButton("jbutton2");
    private JFrame jf=new JFrame("GridBagLayout");
   
    public ShowGridBagLayout(){
    Container c=jf.getContentPane();
    c.setLayout(new GridBagLayout());
    GridBagConstraints gbConstraints=new GridBagConstraints();
   
    gbConstraints.fill=GridBagConstraints.BOTH;
    gbConstraints.anchor=GridBagConstraints.CENTER;
    addComp(jta1,c,gbConstraints,0,0,1,4,0,0);
    addComp(jta2,c,gbConstraints,1,0,2,1,5,1);
    addComp(jtf,c,gbConstraints,1,3,1,1,5,1);
    addComp(jbt1,c,gbConstraints,3,1,1,1,5,0);
    addComp(jbt2,c,gbConstraints,3,2,1,1,5,0);
   
    jp.setBackground(Color.blue);
    jp.setBorder(new javax.swing.border.LineBorder(Color.black));
    gbConstraints.insets=new Insets(10,10,10,10);
    addComp(jp,c,gbConstraints,1,1,2,2,10,1);
   
    jf.setSize(500,500);
    jf.setLocation(200,200);
    jf.setVisible(true);
   
   
    }
   
    public void addComp(Component c,Container container,
    GridBagConstraints gbConstraints,
    int row,int column,
    int numberOfRows,int numberOfColumn,
    double weightx,double weighty){
    gbConstraints.gridx=column;
    gbConstraints.gridy=row;
    gbConstraints.gridwidth=numberOfColumn;
    gbConstraints.gridheight=numberOfRows;
    gbConstraints.weightx=weightx;
    gbConstraints.weighty=weighty;
   
    container.add(c,gbConstraints);
    }
}