View Compilation Error

0_0_31361469_26846\Main.java:1: 错误: 需要class, interface或enum
public static void main (String [] args ){
              ^
0_0_31361469_26846\Main.java:4: 错误: 需要class, interface或enum
x1=sc.nextInt();
^
0_0_31361469_26846\Main.java:5: 错误: 需要class, interface或enum
         y1=sc.nextInt();
         ^
0_0_31361469_26846\Main.java:6: 错误: 需要class, interface或enum
	 x2=sc.nextInt();
	 ^
0_0_31361469_26846\Main.java:7: 错误: 需要class, interface或enum
	 y2=sc.nextInt();
	 ^
0_0_31361469_26846\Main.java:8: 错误: 需要class, interface或enum
	 jl=(y1-y2)/(x2-x1);
	 ^
0_0_31361469_26846\Main.java:9: 错误: 需要class, interface或enum
	system.out.println(""+jl);
	^
0_0_31361469_26846\Main.java:11: 错误: 需要class, interface或enum
 }
 ^
8 个错误