错在哪？那些地方可以简化   自学  谢谢
/*
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package javaapplication3;

/**
 *
 * @author Administrator
 */import *;
public class JavaApplication3 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
      
         char ch;
        System.out.print("请输入一个字符");
        try
        {   ch=(char)System.in.read();}
        catch(IOException e){ }
        System.out.println("字符"+ ch +"的ASCII码值是"+(int)ch);// TODO code application logic here
    }
}