View Compilation Error

0_0_37013216_5014\Main.java:1: 错误: 需要class, interface或enum
public static void main(String[] args) {
              ^
0_0_37013216_5014\Main.java:3: 错误: 需要class, interface或enum
	while(sc.hasNext()) {
	^
0_0_37013216_5014\Main.java:5: 错误: 需要class, interface或enum
    double v = 4.0/3*3.1415927*r*r*r;
    ^
0_0_37013216_5014\Main.java:6: 错误: 需要class, interface或enum
    System.out.printf("%.2f",v);
    ^
0_0_37013216_5014\Main.java:7: 错误: 需要class, interface或enum
    System.out.println();
    ^
5 个错误