View Compilation Error

0_0_20470963_1124.cpp:2:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_20470963_1124.cpp:4:13: error: expected ':' before 'static'
      public static void main(String args[]){
             ^
0_0_20470963_1124.cpp:4:30: error: 'String' has not been declared
      public static void main(String args[]){
                              ^
0_0_20470963_1124.cpp:21:1: error: expected ';' after class definition
 }
 ^
0_0_20470963_1124.cpp: In static member function 'static void Main::main(int*)':
0_0_20470963_1124.cpp:5:7: error: 'Scanner' was not declared in this scope
       Scanner sc=new Scanner(System.in );
       ^
0_0_20470963_1124.cpp:6:13: error: 'sc' was not declared in this scope
       while(sc.hasNext()){
             ^
0_0_20470963_1124.cpp:12:12: error: 'Math' was not declared in this scope
         a= Math.sqrt(a);
            ^
0_0_20470963_1124.cpp:16:8: error: 'System' was not declared in this scope
        System.out.printf("%.2f",s);
        ^