使用gridbaglayout布局方式的疑问

wkc720 2018-10-09 09:24:54

利用GridBagLayout布局方式进行布局。想让表格显示在左边，占9*9的格子。想让2个按钮显示在（11,7）和（11,9）的位置。为什么编程后，两个按钮的位置不对，其中“添加”按钮跑到最上面了？为什么会出现这种情况？想达到自己想要的效果该如何编写代码呢？还请多多指教。
注：配图右图是我想要的效果，图里面的数值是我标注的坐标，和实际编程后出现的效果（左图）。

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.util.Vector;



import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.table.DefaultTableModel;

 

public class ExampleFrame_0333 extends JFrame {

	private JButton okbutton;

	private JButton addbutton;

	private JTable table;

 

	public static void main(String args[]) {

		ExampleFrame_0333 frame = new ExampleFrame_0333();

		frame.setVisible(true);

	}

 

	public ExampleFrame_0333() {

		super();

		setTitle("使用网格组布局管理器");

		getContentPane().setLayout(new GridBagLayout());

		setBounds(100, 100, 500, 370);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 

		table=new JTable();

		table.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);

		table.setEnabled(true);

		DefaultTableModel dftm=(DefaultTableModel) table.getModel();

		dftm.setColumnIdentifiers(new String[] {"型号","线别","站位","原始部番"});

		dftm.addRow(new Vector());

		table.setModel(dftm);

		

		JScrollPane scrollpane=new JScrollPane(table);

		GridBagConstraints gridbagconstraints_1=new GridBagConstraints();

		gridbagconstraints_1.gridx=0;

		gridbagconstraints_1.gridy=0;

		gridbagconstraints_1.gridwidth=9;

		gridbagconstraints_1.gridheight=9;

		gridbagconstraints_1.weightx=1.0;

		gridbagconstraints_1.weighty=1.0;

		gridbagconstraints_1.fill=GridBagConstraints.BOTH;

		gridbagconstraints_1.insets=new Insets(3,3,3,3);

		getContentPane().add(scrollpane,gridbagconstraints_1);

		

		addbutton=new JButton("添加");

		GridBagConstraints gridbagconstraints_2=new GridBagConstraints();

		gridbagconstraints_2.gridx=11;

		gridbagconstraints_2.gridy=7;

		gridbagconstraints_2.insets=new Insets(3,3,3,3);

		getContentPane().add(addbutton,gridbagconstraints_2);

		addbutton.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent arg0) {

				DefaultTableModel model=(DefaultTableModel) table.getModel();

				model.addRow(new Vector());

				

			}

			

		});

		

		okbutton=new JButton("完成");

		GridBagConstraints gridbagconstraints_3=new GridBagConstraints();

		gridbagconstraints_3.gridx=11;

		gridbagconstraints_3.gridy=9;

		gridbagconstraints_3.insets=new Insets(3,3,3,3);

		gridbagconstraints_1.fill=GridBagConstraints.VERTICAL;

		getContentPane().add(okbutton,gridbagconstraints_3);

	}

 

}