inputpanel.java

网络版的学生成绩管理系统

import java.awt.*;

public class InputPanel extends Panel
{
   private static final int TEXT_LENGTH = 10;
   private TextField txtIDNum, txtLast, txtFirst, txtCourse,txtGrade,txtScore;
   
   public InputPanel()
   {
      setLayout( new GridLayout(1,4) );
      
      txtIDNum = new TextField( TEXT_LENGTH );
      add(txtIDNum);      
      txtLast = new TextField( TEXT_LENGTH );
      add(txtLast);
      txtFirst = new TextField( TEXT_LENGTH );
      add(txtFirst);
      txtCourse = new TextField( TEXT_LENGTH );
      add(txtCourse);  
      txtScore = new TextField( TEXT_LENGTH );
      add(txtScore); 
      txtGrade = new TextField(1);
      add(txtGrade);
   }
   public String getId(){
	   return txtIDNum.getText();
   }
   public void setData(Student stu){
	   txtIDNum.setText(stu.getId());
	   txtFirst.setText(stu.getFirstName());
	   txtLast.setText(stu.getLastName());
	   txtCourse.setText(stu.getCourse());
	   txtScore.setText(stu.getScore()+"");
	   txtGrade.setText(stu.getGrade());
   }
   public Student getData(){
		String id=txtIDNum.getText();
		String fr=txtFirst.getText();
		String la=txtLast.getText();
		String co=txtCourse.getText();
		String sc=txtScore.getText();   
		String gr=txtGrade.getText();
		if(id.equals("")||fr.equals("")|la.equals("")||co.equals("")||sc.equals("")||gr.equals(""))
			throw new IllegalArgumentException("请填写完整!");
		
		Student stu=new Student();
		try{
			Integer.parseInt(id);//测试输入ID是否为数字
			stu.setId(id);
		}catch(IllegalArgumentException e){
			throw new IllegalArgumentException("ID应为数字!");
			
		}
		stu.setFirstName(fr);
		stu.setLastName(la);
		stu.setCourse(co);	
		try{
		stu.setScore(Double.parseDouble(sc));	
   		}catch(IllegalArgumentException e){
   			throw new IllegalArgumentException("分数应为数字!");		
   		}
		stu.setGrade(gr);
		return stu;
		
		
	}
   
}