import java.awt.*;
import java.applet.Applet;
class aaa
{
double f(double x,double y)
{
return x*y;
}
}
class bbb extends aaa
{
double f(double x,double y)
{
return x+y;
}
}
public class OverrideExample extends Applet
{
bbb obj;
public void init()
{
obj=new bbb();
}
public void paint(Graphics g)
{
g.drawString("the Object is "+obj.toString(),5,20);
g.drawString("the program's output is "+obj.f(4,6),5,40);
}
}小程序阿,照书上抄的呢。
总是说
F:\Javalesson>java OverrideExample
Exception in thread "main" java.lang.NoSuchMethodError: main,
哪位大侠帮帮忙阿~~
import java.applet.Applet;
class aaa
{
double f(double x,double y)
{
return x*y;
}
}
class bbb extends aaa
{
double f(double x,double y)
{
return x+y;
}
}
public class OverrideExample extends Applet
{
bbb obj;
public void init()
{
obj=new bbb();
}
public void paint(Graphics g)
{
g.drawString("the Object is "+obj.toString(),5,20);
g.drawString("the program's output is "+obj.f(4,6),5,40);
}
}小程序阿,照书上抄的呢。
总是说
F:\Javalesson>java OverrideExample
Exception in thread "main" java.lang.NoSuchMethodError: main,
哪位大侠帮帮忙阿~~
main方法是不是写错了?
内容是
<APPLET CODE="OverrideExample.class" WIDTH=150 HEIGHT=25>
</applet>
然后用IE打开test.html
the Object is bbb@1e5106
不知道是不是想要的