delcourseinfo.java

在本系统中

//删除课程信息。在删除课程信息的过程中，需要判断该课程是否已经存在于课程成绩信息，
//且属于没有完成的状态。如果存在且为未完成状态，则不允许删除；如果存在且为完成状态，允许删除；
//如果不存在，允许删除，同时删除开课信息和选课信息中的该课程信息。

package jin.internalFrame;

import java.awt.*;
import javax.swing.*;
 

import jin.handler.*;
import jin.view.ButtonsPanel;
 

public class DelCourseInfo extends JInternalFrame 
{
	private JLabel[] labels;
	private JComboBox comboBox;
	private JTextField[] fields;
	private ButtonsPanel buttonsPanel;
	private JPanel[] panels;
	
	private JDesktopPane desktopPane;
	private JFrame frame;
	
	public DelCourseInfo(JFrame frame,JDesktopPane desktopPane)
	{
		super("",true,true,true,true);
		this.frame=frame;
		this.desktopPane=desktopPane;
		
		labels=new JLabel[4];		
		fields=new JTextField[3];
		comboBox=new JComboBox();
		comboBox.addItem("请选择");
		
		String str[]={"选择删除课程的编号","课程名称                ","专业编号                ","状态                       "
		};
		for(int i=0;i<4;i++)
		{
			labels[i]=new JLabel(str[i]);
		}		
		
		for(int i=0;i<3;i++)
		{
			fields[i]=new JTextField(8);
		}
		
		buttonsPanel=new ButtonsPanel(1);
		buttonsPanel.setTitle(0,"确定");
		panels=new JPanel[5];
		 
		
		for(int i=0;i<4;i++)
		{			
			panels[i]=new JPanel();
			panels[i].add(labels[i]);		
		}
		
		panels[0].add(comboBox);
		panels[1].add(fields[0]);
		panels[2].add(fields[1]);	
		panels[3].add(fields[2]);	
		
		panels[4]=new JPanel();			
		
		panels[4].add(buttonsPanel);
		
		this.setLayout(new GridLayout(5,1));
		for(int i=0;i<5;i++)
		{			
			add(panels[i]);
		}
		
		desktopPane.add(this);
		frame.add(desktopPane);	
		
		DelCourseInfoHandler handler=new DelCourseInfoHandler(this);
		
		this.setSize(350,250);
		this.setVisible(true);
	}
	
	public static void main(String args[])
	{
		JFrame frame=new JFrame();
	    JDesktopPane desktopPane=new JDesktopPane();
	    DelCourseInfo app=new DelCourseInfo(frame,desktopPane);
	    
	    frame.setSize(500,500);
	    frame.setVisible(true);	    
	}
	
	
	
	public JTextField getField(int index)
	{
		return fields[index];
	}
	
	public JTextField[] getFields()
	{
		return fields;
	}
	public ButtonsPanel getButtonsPanel()
	{
		return buttonsPanel;
	}
	
	public JComboBox getComboBox()
	{
		return comboBox;
	}
}