java - 错误：令牌“（”，；预期的语法错误

Question

我在同一行有两个问题，第一个是

Error: Syntax error on token "(", ; expected
Error: Syntax error on token ")", ; expected

我不知道为什么它告诉我这个错误，noob 模式正在启动，所以我无法弄清楚。

import java.awt.*;//for graphics class
import java .util.*;// for scanner class
//start of class
public class bouncingball {
     // public static final int CENTER = 300;


      //start of main
      public static void main(String[] args) {

       System.out.println("Project 2 modified by Jordan Spicer");

        DrawingPanel panel = new DrawingPanel(400, 400);

        Graphics g = panel.getGraphics();

        Scanner input = new Scanner(System.in);
        ball(g);
        int test = 0;
        String colors = "";
        System.out.println(" this program prints out a bouncing ball");


       System.out.println("please pick a color for the ball either red or blue ");

        colors = input.nextLine();

        if( (colors.compareTo("blue") == 0) ||colors.compareTo("red") == 0){

        System.out.println("that wasnt a good color try again only put red or blue");

          colors = input.nextLine();
          System.out.println(colors);

        }       
        else{
          System.out.println(colors);


        }

        public static void ball (Graphics g){ <======= the errors are at this line here
          g.setcolor(Color.RED);
       g.drawcircle(50,50,50,50);



        }


    }
}

Answer 1

看来您在另一种方法中使用方法。把它移到外面。将以下方法声明移到外部。

public static void ball (Graphics g){....}

Answer 2

现在对java有点生疏了，但我不认为你可以有这个方法

public static void ball (Graphics g)

在 main 方法内部。尝试在 main 方法之前声明它？