View Compilation Error

0_0_26435793_16055\Main.java:3: 错误: 需要class, interface或enum
	public static void main(String[] args){        
	              ^
0_0_26435793_16055\Main.java:4: 错误: 需要class, interface或enum
		Scanner in = new Scanner(System.in);        BigInteger a = in.nextBigInteger();        
		                                            ^
0_0_26435793_16055\Main.java:5: 错误: 需要class, interface或enum
		BigInteger b = in.nextBigInteger();
		^
0_0_26435793_16055\Main.java:7: 错误: 需要class, interface或enum
       	System.out.println(a.add(b));    
       	^
0_0_26435793_16055\Main.java:8: 错误: 需要class, interface或enum
	}
	^
5 个错误