求救~~~救命呀!!

南山悠然

本人是个初学者
今天正在做JAVA小程序APPLET的习题,
题目是:
   编写一个APPLET,允许用户输入方法drawOval所需要的4个参数然后使用4个输入的值画一个椭圆.
哪位教一下我..我哪里写错了.还有就是哪里漏写了???谢谢了,
我写了如下:
import java.awt.Graphics;
import javax.swing.*;
public class ZhengApplet extends JApplet{
double number1;
double number2;
double number3;
double number4;
public void init()
{
String firstNumber;
String secondNumber;
String thirdNumber;
String fourthNumber;
double number1;
double number2;
double number3;
double number4;
firstNumber=JOptionPane.showInputDialog(
"输入第一个数：" );
secondNumber=JOptionPane.showInputDialog(
"输入第二个数：" );
thirdNumber=JOptionPane.showInputDialog(
"输入第三个数：" );
fourthNumber=JOptionPane.showInputDialog(
"输入第四个数：" );
number1=Double.parseDouble(firstNumber);
number2=Double.parseDouble(secondNumber);
number3=Double.parseDouble(thirdNumber);
number4=Double.parseDouble(fourthNumber);
}
public void paint( Graphics g ){
super.paint(g);
g.drawOval(number1,number2,number3,number4);
}
}
[em3]

人工智能天使

import java.awt.Graphics;
import javax.swing.*;

public class ZhengApplet extends JApplet{
int number1;
int number2;
int number3;
int number4;

public void init()
{
String firstNumber;
String secondNumber;
String thirdNumber;
String fourthNumber;

firstNumber = JOptionPane.showInputDialog(
"输入第一个数：" );
secondNumber = JOptionPane.showInputDialog(
"输入第二个数：" );
thirdNumber = JOptionPane.showInputDialog(
"输入第三个数：" );
fourthNumber = JOptionPane.showInputDialog(
"输入第四个数：" );
number1=(int)Double.parseDouble(firstNumber);//这里需要强制转换成整型
number2=(int)Double.parseDouble(secondNumber);
number3=(int)Double.parseDouble(thirdNumber);
number4=(int)Double.parseDouble(fourthNumber);
}

public void paint( Graphics g ){
super.paint(g);
/*
g.drawOval(int,int,int,int)这个函数只能接受整数参数
*/
g.drawOval(number1,number2,number3,number4}
}

lsmwell

呵呵,郁闷的人,这么不细心~~!