Question

import java.awt.*; import java.applet.*; public class ColorCE extends Applet{ public void print(Gra

import java.awt.*;
import java.applet.*;
public class ColorCE extends Applet{
public void print(Graphics g){
g.drawString("This is default Color!",20,20);
Color(0.6f,0.4f,0.2f);
g.setColor(c);
g.drawString("This is new Color!",20,60);
}
public static void main(String[] args){
}
}
//import java.applet.Applet;
class JA extends Applet{ //interface expected{
String printtext;
public void init(){
printtext="JA";
}
public void print(Graphics g){
g.drawString(Printtext,20,20);
}
} 符号： 方法 Color(float,float,float)
location: 类 ColorCE
colorce.java:7: 找不到符号
g.setColor(c);
^
符号： 变量 c
位置： 类 ColorCE
colorce.java:20: 找不到符号
g.drawString(Printtext,20,20);
^
符号： 变量 Printtext
位置： 类 JA
3 错误
这是什么原因呀

Answer 1

Color(0.6f,0.4f,0.2f);
g.setColor(c);

没有声明 c
Color c = new Color(0.6f,0.4f,0.2f);

=======================================

g.drawString(Printtext,20,20); printtext 是小写的

==========================
另外 Applet 中不需要main方法，它是嵌入网页中运行的

Answer 2

import java.awt.*;
import java.applet.*;
public class ColorCE extends Applet{
public void print(Graphics g){
g.drawString("This is default Color!",20,20);
Color c = new Color(0.6f,0.4f,0.2f);
g.setColor(c);
g.drawString("This is new Color!",20,60);
}
}
class JA extends Applet{ //interface expected{
String printtext;
public void init(){
printtext="JA";
}
public void print(Graphics g){
g.drawString(printtext,20,20);
}
}