View Compilation Error

0_0_18743932_25265\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_18743932_25265\Main.java:3: 错误: 需要class, interface或enum
		Scanner k = new Scanner(System.in);
		^
0_0_18743932_25265\Main.java:4: 错误: 需要class, interface或enum
		while (k.hasNextDouble()){
		^
0_0_18743932_25265\Main.java:6: 错误: 需要class, interface或enum
		v = (double) 4 / 3 * 3.14 * r * r  * r;
		^
0_0_18743932_25265\Main.java:7: 错误: 需要class, interface或enum
		System.out.printf("%.3f", v );
		^
0_0_18743932_25265\Main.java:9: 错误: 需要class, interface或enum
		}
		^
6 个错误