View Compilation Error

0_0_20444137_18946.cpp:1:1: error: 'import' does not name a type
 import java.util.*;
 ^
0_0_20444137_18946.cpp:3:9: error: expected ':' before 'static'
  public static void mian(String args[]){
         ^
0_0_20444137_18946.cpp:3:26: error: 'String' has not been declared
  public static void mian(String args[]){
                          ^
0_0_20444137_18946.cpp:18:1: error: expected ';' after class definition
 }
 ^
0_0_20444137_18946.cpp: In static member function 'static void Main::mian(int*)':
0_0_20444137_18946.cpp:4:3: error: 'Scanner' was not declared in this scope
   Scanner sc=new Scanner(System.in );
   ^
0_0_20444137_18946.cpp:5:9: error: 'sc' was not declared in this scope
   while(sc .hasNext()){
         ^
0_0_20444137_18946.cpp:12:8: error: 'Math' was not declared in this scope
    dis=Math.sqrt(dis);
        ^
0_0_20444137_18946.cpp:13:4: error: 'System' was not declared in this scope
    System.out.printf("2f", dis);
    ^