View Compilation Error

0_0_15377644_19605\Main.java:1: 错误: 需要class, interface或enum
	public static void main(String[] args) {
	              ^
0_0_15377644_19605\Main.java:3: 错误: 需要class, interface或enum
		double R, V;
		^
0_0_15377644_19605\Main.java:4: 错误: 需要class, interface或enum
		double PI=3.1415927;
		^
0_0_15377644_19605\Main.java:5: 错误: 需要class, interface或enum
		R=r.nextDouble();
		^
0_0_15377644_19605\Main.java:6: 错误: 需要class, interface或enum
		V=4.0/3*PI*R*R*R;
		^
0_0_15377644_19605\Main.java:7: 错误: 需要class, interface或enum
		System.out.printf("%3f\r\n",V);
		^
0_0_15377644_19605\Main.java:8: 错误: 需要class, interface或enum
		}
		^
7 个错误