怎么才能调用自己的类？？？？(20分)

L

lpacec

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2002-08-19

• #1

我想输出一个图形，但不想用传统的方法，而是调用我自己定义的CLASS，请问下面的程序哪出错了？
应该怎么写？
import java.awt.*;
import java.applet.*;
public class paint2 extends Applet
{

class pp(){
Graphics g;
}
public void draw_image()
{
pp paint2=new pp();
paint2.g.setColor(Color.blue);
　　　　　　 paint2.g.fillRect(0,0,20,20);
}
public void run()
{
draw_image();
}
}

 

X

xyzhou7

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GUEST, unregistred user!

• 2002-08-21

• #2

import java.awt.*;
import java.applet.*;
public class paint2 extends Applet
{
public void draw_image()
{
pp paint2=new pp();
paint2.g.setColor(Color.blue);
　　　　　　 paint2.g.fillRect(0,0,20,20);
}
public void run()
{
draw_image();
}
}
class pp(){
Graphics g;
}
兄弟，多给点银子，你的问题费了俺不少脑细胞！

 

L

lpacec

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2002-08-21

• #3

xyzhou7,
你这个不行啊。出了很多错啊。
出错信息如下：
d:/paint3.java:18: '{' expected
class pp()
^
d:/paint3.java:22: '}' expected
}
^
d:/paint3.java:9: cannot resolve symbol
symbol : variable g
location: class pp
paint3.g.setColor(Color.blue);
^
d:/paint3.java:10: cannot resolve symbol
symbol : variable g
location: class pp
paint3.g.fillRect(0,0,20,20);
^
4 errors

 

D

dippa

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GUEST, unregistred user!

• 2002-08-22

• #4

import java.awt.*;
import java.applet.*;
public class paint2 extends Applet
{

public void draw_image()
{
Color c = new Color(0);
pp paint2=new pp();
paint2.g.setColor(c.blue );
paint2.g.fillRect(0,0,20,20);
}
public void run()
{
draw_image();
}
}

class pp{
Graphics g;
}

 

D

dippa

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2002-08-22

• #5

哦 忘写了一句 paint2.g.fillRect(0,0,20,20);
你自己加再原位置吧

 

L

lpacec

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GUEST, unregistred user!

• 2002-08-22

• #6

接受答案了.

 

L

lpacec

Unregistered / Unconfirmed

GUEST, unregistred user!

• 2002-08-22

• #7

大侠，过是能通过，但是什么都看不见啊。真的，就像没加载一样，一片空白