View Compilation Error

0_0_24110184_24341\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args){
              ^
0_0_24110184_24341\Main.java:3: 错误: 需要class, interface或enum
      while(i>0){
      ^
0_0_24110184_24341\Main.java:5: 错误: 需要class, interface或enum
    	  r = ball.nextDouble();
    	  ^
0_0_24110184_24341\Main.java:6: 错误: 需要class, interface或enum
    	  s=4*(PI*r*r*r)/3;
    	  ^
0_0_24110184_24341\Main.java:7: 错误: 需要class, interface或enum
    	  System.out.printf("%.3f\n",s);
    	  ^
0_0_24110184_24341\Main.java:8: 错误: 需要class, interface或enum
      }
      ^
6 个错误