GUI 布局 GridBagLayout

GridBagLayout 网格包布局管理器
 GridBagLayout在网格的基础上提供更为复杂的布局。和GridLayout不同，GridBagLayout允许容器中各个

组件的大小各不相同，还允许单个组件所在的显示区域占据多个网格。使用GridBagLayout的布局管理器的步骤如

下。
 1。创建GridBagLayout布局管理器，并使容器采用该布局管理器
  GridBagLayout layout = new GridBagLay();
  container.setLayout(layout);
 2。创建GridBagConstraints对象。
  GridBagConstraints constraints = new GridBagConstraints();
 3。为第一个添加到容器中的组件设置GridBagConstraints的各个属性。
  constraints.gridx=1; //设置网格的左上角的x坐标
  constraints.gridy=1; //设置网格的左上角的y坐标
  constraints.gridwidth=1; //设置网格的宽度
  constraints.gridheight=1; //设置网格的高度
 4。通知布局管理器放置第一个组件时的GridBagConstraints信息
  layout.setConstraints(component1,constraints);
 5。向容器中添加第一个组件。
  container.add(component1);
 6。重复步骤（3）~（5），将每个组件都添加到容器中

 

代码：

package com.test.testswing; import java.awt.Font; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import javax.swing.JApplet; import javax.swing.JButton; import javax.swing.JFrame; public class TestGridBagLayout extends JApplet { protected void makebutton(String name, GridBagLayout gridbag, GridBagConstraints c) { JButton button = new JButton(name); gridbag.setConstraints(button, c); add(button); } public void init() { GridBagLayout gridbag = new GridBagLayout(); GridBagConstraints c = new GridBagConstraints(); setFont(new Font("SansSerif", Font.PLAIN, 14)); setLayout(gridbag); c.fill = GridBagConstraints.BOTH; c.weightx = 1.0; makebutton("Button1", gridbag, c); makebutton("Button2", gridbag, c); makebutton("Button3", gridbag, c); c.gridwidth = GridBagConstraints.REMAINDER; //end row makebutton("Button4", gridbag, c); c.weightx = 0.0; //reset to the default makebutton("Button5", gridbag, c); //another row c.gridwidth = GridBagConstraints.RELATIVE; //next-to-last in row makebutton("Button6", gridbag, c); c.gridwidth = GridBagConstraints.REMAINDER; //end row makebutton("Button7", gridbag, c); c.gridwidth = 1; //reset to the default c.gridheight = 2; c.weighty = 1.0; makebutton("Button8", gridbag, c); c.weighty = 0.0; //reset to the default c.gridwidth = GridBagConstraints.REMAINDER; //end row c.gridheight = 1; //reset to the default makebutton("Button9", gridbag, c); makebutton("Button10", gridbag, c); setSize(600, 600); } public static void main(String args[]) { JFrame f = new JFrame("GridBagLayout Example"); TestGridBagLayout ex1 = new TestGridBagLayout(); ex1.init(); f.add("Center", ex1); f.pack(); f.setSize(f.getPreferredSize()); f.setVisible(true); } }

例子转自： jdk帮助文档

 文字转自：孙卫琴 java面向对象