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package 方法覆盖程序举例;
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);
}
}