import java.applet.*;
import java.awt.*;
import java.lang.*;
public class sanzi extends Applet{
public void paint(Graphics g){
int r=0;
int i;
String[] col={"red","blue","yellow","orange","green","magenta","cyan"};
for(i=0;i<7;i++,r+=20)
{
g.setColor(Color.black);
g.drawArc(30, 40, 150, 150, r+20, 20);
g.setColor(Color.getColor(col[i]));
g.fillArc(30, 40, 149, 149, r+20, 20);
}}
}大家帮忙看下 这个程序错出在什么地方了?
题目要求输出七彩扇面
谢谢啦~~
import java.awt.*;
import java.lang.*;
public class sanzi extends Applet{
public void paint(Graphics g){
int r=0;
int i;
String[] col={"red","blue","yellow","orange","green","magenta","cyan"};
for(i=0;i<7;i++,r+=20)
{
g.setColor(Color.black);
g.drawArc(30, 40, 150, 150, r+20, 20);
g.setColor(Color.getColor(col[i]));
g.fillArc(30, 40, 149, 149, r+20, 20);
}}
}大家帮忙看下 这个程序错出在什么地方了?
题目要求输出七彩扇面
谢谢啦~~
还有,为什么不直接用Color数组
Color[] col = {Color.red,Color.blue,Color.yellow,Color.orange,Color.green,Color.magenta,Color.cyan};
int r=0;
int i;
Color col[]={Color.red,Color.black,Color.blue,Color.cyan,Color.green,Color.orange,Color.yellow}; for(i=0;i<7;i++,r+=20)
{
g.setColor(Color.black);
g.drawArc(30, 40, 150, 150, r+20, 20);
g.setColor((col[i]));
g.fillArc(30, 40, 149, 149, r+20, 20);
}}改成这样运行就能成功了 drawArc(int x,int y,int width,int height,int startAngle,int arcAngle);
(x,y)是弧形的中心,width是弧形的宽,height是弧形的高,startAngle是弧形的起始角度,arcAngle是弧形的弧度 但是为什么不能用String数组呢?
书上是这样写的String[] col={red,blue,yellow,orange,green,magenta,cyan};
g.setColor(Color.(col[i]));
但是运行出错 不知道为什么?
Color.后面应该是Color类里静态变量,我觉得是jdk不能把String转换过来