gridbaglayoutexam.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class gridBagLayoutExam  extends JFrame {
  protected void makebutton(String name, GridBagLayout gridbag,
                            GridBagConstraints c) {
    Button btn = new Button(name);
    gridbag.setConstraints(btn, c);
    add(btn);
  }
  public gridBagLayoutExam() {
  	super("GridBagLayout布局管理");
    GridBagLayout gridbag = new GridBagLayout();
    GridBagConstraints gbconstraint = new GridBagConstraints();
    setFont(new Font("SansSerif", Font.PLAIN, 14));
    setLayout(gridbag);
    gbconstraint.fill = GridBagConstraints.BOTH;
    gbconstraint.weightx = 1.0;
    makebutton("按钮1", gridbag, gbconstraint);
    makebutton("按钮2", gridbag, gbconstraint);
    makebutton("按钮3", gridbag, gbconstraint);
    gbconstraint.gridwidth = GridBagConstraints.REMAINDER;
    makebutton("按钮4", gridbag, gbconstraint);
    gbconstraint.weightx = 0.0;
    makebutton("按钮5", gridbag, gbconstraint);
    gbconstraint.gridwidth = GridBagConstraints.RELATIVE;
    makebutton("按钮6", gridbag, gbconstraint);
    gbconstraint.gridwidth = GridBagConstraints.REMAINDER;
    makebutton("按钮7", gridbag, gbconstraint);
    gbconstraint.gridwidth = 1;
    gbconstraint.gridheight = 2;
    gbconstraint.weighty = 1.0;
    makebutton("按钮8", gridbag, gbconstraint);
    gbconstraint.weighty = 0.0;
    gbconstraint.gridwidth = GridBagConstraints.REMAINDER;
    gbconstraint.gridheight = 1;
    makebutton("按钮9", gridbag, gbconstraint);
    makebutton("按钮10", gridbag, gbconstraint);
    setSize(300, 180);
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }
  public static void main(String args[]) {
    gridBagLayoutExam f = new gridBagLayoutExam();
    f.setVisible(true);
  }
}