View Compilation Error

0_0_29411969_3955\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_29411969_3955\Main.java:3: 错误: 需要class, interface或enum
      while(sc.hasNextDouble()) {
      ^
0_0_29411969_3955\Main.java:5: 错误: 需要class, interface或enum
    	  double y1=sc.nextDouble();
    	  ^
0_0_29411969_3955\Main.java:6: 错误: 需要class, interface或enum
    	  double x2=sc.nextDouble();
    	  ^
0_0_29411969_3955\Main.java:7: 错误: 需要class, interface或enum
    	  double y2=sc.nextDouble();
    	  ^
0_0_29411969_3955\Main.java:8: 错误: 需要class, interface或enum
    	  double d = Math.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
    	  ^
0_0_29411969_3955\Main.java:9: 错误: 需要class, interface或enum
    	  System.out.printf("%.2f",d);
    	  ^
0_0_29411969_3955\Main.java:10: 错误: 需要class, interface或enum
    	  System.out.println();
    	  ^
0_0_29411969_3955\Main.java:11: 错误: 需要class, interface或enum
      }
      ^
9 个错误