图书管理系统代码 6 AboutFrame （…

import java.awt.BorderLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import java.awt.Graphics; import java.awt.GridBagLayout; import java.awt.GridLayout; import java.awt.Image; import java.awt.Toolkit; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;

import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.SwingConstants; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException;

public class AboutFrame extends JFrame { public AboutFrame(){ setTitle("图书管理系统—关于"); Toolkit kit = Toolkit.getDefaultToolkit(); Dimension screenSize = kit.getScreenSize(); double screenWidth = screenSize.getWidth(); double screenHeight = screenSize.getHeight(); setBounds((int)screenWidth/2-DEFAULT_WIDTH/2,(int)screenHeight/2-DEFAULT_HEIGHT/2,DEFAULT_WIDTH,DEFAULT_HEIGHT); //设置图标 Image ima = kit.getImage("library.png"); setIconImage(ima); //设置 观感 String plaf = "com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel"; try { UIManager.setLookAndFeel(plaf); } catch (ClassNotFoundException e2) { e2.printStackTrace(); } catch (InstantiationException e2) { e2.printStackTrace(); } catch (IllegalAccessException e2) { e2.printStackTrace(); } catch (UnsupportedLookAndFeelException e2) {  e2.printStackTrace(); } SwingUtilities.updateComponentTreeUI(this);

this.setResizable(false); //设置字体 Font f1 = new Font("隶书",Font.PLAIN,20); Font f2 = new Font("隶书",Font.PLAIN,20); this.setLayout(new BorderLayout()); JPanel northPanel = new JPanel(); JPanel southPanel = new JPanel(); this.add(northPanel,BorderLayout.CENTER); this.add(southPanel,BorderLayout.SOUTH); northPanel.setLayout(new GridBagLayout()); lb1 = new JLabel("作者："); lb1.setForeground(FG1); lb1.setFont(f1); lb2 = new JLabel("刘汪洋"); lb2.setForeground(FG2); lb2.setFont(f2); lb3 = new JLabel("版本："); lb3.setForeground(FG1); lb3.setFont(f1); lb4 = new JLabel("1.0.0"); lb4.setForeground(FG2); lb4.setFont(f2); northPanel.add(lb1,new GBC(0,0)); northPanel.add(lb2,new GBC(1,0)); northPanel.add(lb3,new GBC(0,1)); northPanel.add(lb4,new GBC(1,1)); southPanel.setLayout(new FlowLayout()); JButton ok = new JButton("确定",new ImageIcon("ok.png")); southPanel.add(ok); ok.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { AboutFrame.this.setVisible(false); AboutFrame.this.dispose(); } }); this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

} public  static final int DEFAULT_WIDTH =350; public  static final int DEFAULT_HEIGHT =200; private Image image; private JLabel lb1; private JLabel lb2; private JLabel lb3; private JLabel lb4; Color FG1 = Color.RED; Color FG2 = Color.BLUE; }