-1
行,所以我有这个计划,我从我的导师Java错误:找不到符号
import acm.program.*;
public class GRectPlusGOval extends GraphicsProgram {
public void run() {
GRect rect = new GRect(100, 50, 125, 60);
rect.setFilled(true);
rect.setColor(Color.RED);
add(rect);
GOval oval = new GOval(100, 50, 125, 60);
oval.setFilled(true);
oval.setFillColor(Color.GREEN);
add(oval);
}
}
复制并试图编译它,当我得到这个消息:
grectplusgoval.java:4: error: cannot find symbol
GRect rect = new GRect(100,50,125,60);
^
symbol:class GRect
location:class GRectPlusGOval
grectplusgoval.java:4: error: cannot find symbol
GRect rect = new GRect(100,50,125,60);
^
symbol:class GRect
location:class GRectPlusGOval
grectplusgoval.java:6: error: cannot find symbol
rect.setColor(Color.RED);
^
symbol:variable Color
location:class GRectPlusGOval
grectplusgoval.java:8: error: cannot find symbol
GOval oval = new GOval(100,50,125,60)
^
symbol:class GOval
location:class GRectPlusGOval
grectplusgoval.java:8: error: cannot find symbol
GOval oval = new GOval(100,50,125,60)
^
symbol:class GOval
location:class GRectPlusGOval
grectplusgoval.java:10: error: cannot find symbol
oval.setFillColor(Color.GREEN);
^
symbol: variable Color
location:class GRectPlusGOval
6 errors
什么是错的,我该如何纠正这一点?
什么是类'GRect' – 2014-12-07 04:20:17
您是否导入了这些类? – August 2014-12-07 04:20:57
它看起来像你需要导入'acm.graphics。*'。 – August 2014-12-07 04:25:33