View Compilation Error

0_0_18661219_2183\Main.java:5: 错误: 需要class, interface或enum
	public static void main(String[] args) {
	              ^
0_0_18661219_2183\Main.java:7: 错误: 需要class, interface或enum
		double m,n;
		^
0_0_18661219_2183\Main.java:8: 错误: 需要class, interface或enum
		m=kb.nextDouble();
		^
0_0_18661219_2183\Main.java:9: 错误: 需要class, interface或enum
		n=kb.nextDouble();
		^
0_0_18661219_2183\Main.java:10: 错误: 需要class, interface或enum
		if(m<0){
		^
0_0_18661219_2183\Main.java:12: 错误: 需要class, interface或enum
		}if(n<0){
		^
0_0_18661219_2183\Main.java:14: 错误: 需要class, interface或enum
		}System.out.printf("%.2f\n%.2f\n",m,n);
		^
0_0_18661219_2183\Main.java:20: 错误: 需要class, interface或enum
	}
	^
8 个错误