一个简单的学生成绩管理信息系统(java)

(); Р int width = this.getWidth();Р Р picture.setBounds(0,0,360,360);Р ((JPanel)contentPane).setOpaque(false);Р Р frame.setLocation(screenWidth-width/2, screenHeight-height/2);Р frame.setVisible(true); Р?}Р public class insertActionPerformed implements ActionListenerР {Р public void actionPerformed(ActionEvent e)Р {Р new Insert().setVisible(true);Р } Р }Р public class modifyActionPerformed implements ActionListenerР {Р public void actionPerformed(ActionEvent e)Р {Р new Modify().setVisible(true);Р } Р }Р public class queryActionPerformed implements ActionListenerР {Р public void actionPerformed(ActionEvent e)Р {Р new Query().setVisible(true);Р } Р }Р public class deleteActionPerformed implements ActionListenerР {Р public void actionPerformed(ActionEvent e)Р {Р new Delete().setVisible(true);