switchtest.java

来自「java applet编程,实现对相关图片声音的调用」· Java 代码 · 共 47 行

import java.awt.*;
import java.applet.Applet;
public class switchTest extends Applet
{   Label prompt;
    TextField input;
    int acount=0,bcount=0,ccount=0,
        dcount=0,fcount=0;
    
    public void init(  )
    {
    	 prompt=new Label("Enter grade");
         input=new TextField (2);
         add(prompt);
         add(input);
    }      
     
    public void paint (Graphics g)
    {g.drawString("Totals for each letter grade:",25,40);
      g.drawString("A: "+acount,25,55);
      g.drawString("B: "+bcount,25,70);
      g.drawString("C: "+ccount,25,85);
      g.drawString("D: "+dcount,25,100);
      g.drawString("F: "+fcount,25,115);
    }
     
    public boolean action (Event e,Object o)
    {
      String val=o.toString( );
      char grade=val.charAt(0);
      showStatus(" "); 
      input.setText(" ");     
      
      switch(grade)
      { case 'A':case'a':++acount ; break;
        case 'B':case'b':++bcount ; break;
        case 'C':case'c':++ccount ; break;
        case 'D':case'd':++dcount ; break;
        case 'F':case'f':++fcount ; break;
        default:
          showStatus("Incorrect grade.Enter new grade.");
          break;
       }
       repaint( );
       return true;
    }
 }