学习swing组件.doc

学习swing组件,主要有三个内容 一是组件的显示,二是对组件支持的事件进行侦听,三是是自定义组件 1.JFrame JFrame是主窗口,它和JDialog,JApplet的地位并列.但是,一个JFrame可以添加JDialog和JApplet进去它的内容面板,而反过来就不行 下面来看JFrame的例子 =================================================Java代码 package?blog.swing; ?? import?javax.swing.*; ?? import?java.awt.event.*; ?? ?? class??JFrameDemo ?? { ?? ?JFrame?mainFrame; ?? ?public?JFrameDemo()?{ ?? ??mainFrame?=?new?JFrame?(?JFrameDemo?Title?);?//创建一个JFrame? ?? ??mainFrame.setDefaultCloseOperation(?JFrame.EXIT_ON_CLOSE?);//设置关闭动作 ?? ??mainFrame.setSize(?300,300?);//设置窗口大小 ?? ??mainFrame.setLocationRelativeTo(null);//使窗口显示在屏幕中央 ?? ?? ??mainFrame.addWindowListener(?new?WindowListener(){ ?? ???public?void?windowOpened(?WindowEvent?e?){?System.out.println(?window?opened?);?} ?? ???public?void?windowClosing(?WindowEvent?e?){?System.out.println(?window?closing?);?} ?? ???public?void?windowClosed(?WindowEvent?e?){?System.out.println(?window?closed?);?} ?? ???public?void?windowIconified(?WindowEvent?e?){?System.out.println(?window?iconified?);?} ?? ???public?void?windowDeiconified(?WindowEvent?e?){?System.out.println(?window?deiconified?);?} ?? ???public?void?windowActivated(?WindowEvent?e?){?System.out.println(?window?activated?);?} ?? ???public?void?windowDeactivated(?WindowEvent?e?){?System.out.println(?window?deactivated?);?} ?? ??}); ?? ??mainFrame.addWindowFocusListener(?new?WindowFocusListener(){ ?? ???public?void?windowGainedFocus(?WindowEvent?e?){?System.out.println(?gained?focus?);?} ?? ???public?void?windowLostFocus(?WindowEvent?e?){?System.out.println(?lost?focus?);?} ?? ??}); ?? ??mainFrame.addWindowStateListener(?new?WindowStateListener(){ ?? ???public?void?windowStateChanged(?WindowEvent?e?){?System.out.println(?state?changed?);?} ?? ??}); ?? ?? ??mainFrame.setVisible(?true?); ?? ?} ?? ?public?static?void?main(String[]?args)? ?? ?{ ?? ??new?JFrameDemo(); ?? ?} ?? }?? package blog.swing; import javax.swing.*; import java.awt.event.*; class JFrameDemo { JFrame mainFrame; public JFrameDemo()