Question

我的程序只有在我移动“setBackground（color）;”时才能正常工作到“init（）”。怎么解决？我的任务是传入对应于RGB值的三个整数，并使用适当的颜色构造函数来设置背景颜色。

import java.applet.*;
import java.awt.*;

public class AnAppletSubclass2b extends Applet {
int r;
int g;
int b;
Color color;
public void init()
{

    String parmStringRED =  getParameter("red");
     r = Integer.parseInt(parmStringRED);
    String parmStringGREEN =  getParameter("green");
     g = Integer.parseInt(parmStringGREEN);
    String parmStringBLUE =  getParameter("blue");
     b = Integer.parseInt(parmStringBLUE);
    Color color = new Color (r,g,b);

    System.out.println("The parameter are: red: " + parmStringRED + ", green: " + parmStringGREEN + ", blue: " + parmStringBLUE);


}

public void paint(Graphics g)
{
    setBackground(color);
    System.out.println("In paint: n = " + n);
    n++;
}

int n;
}
<HTML>
<HEAD>
    <TITLE> AnApplet With Parms </TITLE>
</HEAD>
<BODY>
<p>Here is the output of my  Program:</p>   
<APPLET CODE="AnAppletSubclass2b.class" WIDTH=150 HEIGHT=100>
<PARAM name="red" value="25" >      
<PARAM name="green" value="250">
<PARAM name="blue" value="120">
</APPLET>
</BODY>
</HTML>

Answer 1

您将颜色变量定义为字段，将另一个定义为本地。变化

Color color = new Color (r,g,b);

到

color = new Color (r,g,b);

如何修复applet参数

1 个答案: