View Compilation Error

0_0_36992499_19241.cpp:3:10: error: expected ':' before 'static'
   public static void main(String arg[]) {
          ^
0_0_36992499_19241.cpp:3:27: error: 'String' has not been declared
   public static void main(String arg[]) {
                           ^
0_0_36992499_19241.cpp:8:1: error: expected ';' after class definition
 }
 ^
0_0_36992499_19241.cpp: In static member function 'static void Solution::main(int*)':
0_0_36992499_19241.cpp:4:5: error: 'Scanner' was not declared in this scope
     Scanner in = new Scanner(System.in);
     ^