leiofll wrote:
你必须先要把命令行进入jdk的bin 目录
如：
假如你的jdk在g:\jdk\
就必须先进入g:\jdk\bin\，然后再用javac
因为javac是在bin目录下的一个可执行程序

leiofll wrote:
如果是个不大的程序就存在bin下

如果你想要自己写一个类包
就放在classpath指定的目录下
默认的是jdk\jre\
新建一个classes放进去就可以了

也可以通过 javac classpath 来设置地址（不过这个命令我有点记不清楚了，好长时间没用过了，不好意思）

还有一点，程序必须放在bin下才可以用同样是在bin下的javac 命令来编译

why wrote:


You could , but don't do so!

You could , but don't do so!

javac -classpath ...

no, No, NO!
You don't put your own stuff in the bin folder, but only have to include it in the PATH.


showren :
Get an introductory book to read... search for this in this board...
I'm tired of repeating, reapting and repeating...

sigh...

showren wrote:
为什么上面写着我 驱动器C：中没有标签呢？

import java.awt.*;
import java.applet.*;
public class AttrHidden_Exp extends Applet
{
 Students s=new Student();
 special_Students ss=new special_Students(1,"童勇木","计算机");
 public void paint(Graphics g)
 {
  g.drawString("直接调用父类及格分数:"+s.passScore,20,20);
  g.drawString("直接调用子类及格分数:"+ss.passScore,20,40);
  g.drawString("用父类方法调用父类及格分数:"+s.getPassScore(),20,60);
  g.drawString("用子类方法调用子类及格分数:"+ss.getPassScore(),20,80);
  g.drawString("用继承自父亲类的方法调用父类及格分数:"+ss.getPassScore(),20,100);
 }
}
class Students
{
 int StudentNo=1;
 String StudentName;
 int MathsScore;
 int PoliticsScore;
 int EnglisScore;
 double passScore=60;
 Students(){}
 Students(int sNo,String sName)
{
 if(sNo>0)
  StudentNo=sNo;
 StudentName=new String(sName);
}
 double getPassScore()
{
 return passScore;
 }
}
class special_Students extends Students
{
 double passScore=50;
 String specialty;
 special_Students(int sNo,String sName, String sp)
{
 if(sNo>0)
  StudentNo=sNo;
 StudentName=new String(sName);
 specialty=sp;
}
double getSPassScore()
{
 return passScore;
}
}

{ make good use of the [ code ] tag.
1. try not to use plural form as class name.
2. underscore is rarely used for class name.
3. Initcap class name, use Camel-case. }

showren wrote:
谢谢WHY 回答我这多
但是我刚才看了你给我的那个例子，但是他好象是用的 APPLATATION
我用的是 APPLET

why wrote:
Application vs Applet, so what?
The java files would be compiled in the same way.

There are so many topics in this board about how to run an applet -- repeated, repeated and repeated.

If you are too "busy doing others" and could not concentrate on Java learning, take a break and not to waste our time on Java until you're ready.

showren wrote:
被你打击了。。。。
我看我得去买那个张孝祥的JAVA基础学习光碟看看了。免得 waste your time

why wrote:
打击是必須的：
當閣下的開發環境仍是一塌糊塗，而且Applet怎様運行也沒弄清楚，便東拉西扯．基礎全無，並不知努力實幹，以忙於其他事務為藉口，學甚麼都要失敗的．
忠心逆耳．就此告別．

showren wrote:
对了，对于你刚才那个编译的问题，好象不同机器平台运行JVM都不同哦。
我学校的是WINXP 但是一般把文件编好用 "类名.java"保存，然后在dos下 只用运行 JAVAC 类名.java就行。而在家 却 非要 用你那种 方法 先要运行ehco %java_home% %java_path% echo %classpath%才行哦？ 那是不是以后我每次编好 程序 都要先运行一次以上几个 代码才行吗？ 我家的是 WIN2000的系统

showren wrote:
cannot resolve symbol