View Compilation Error

0_0_26251799_8581.cpp:1:1: error: 'import' does not name a type
 import java.util.Scanner;
 ^
0_0_26251799_8581.cpp:4:8: error: expected ':' before 'static'
 public static void main(String[] args) 
        ^
0_0_26251799_8581.cpp:4:25: error: 'String' has not been declared
 public static void main(String[] args) 
                         ^
0_0_26251799_8581.cpp:4:34: error: expected ',' or '...' before 'args'
 public static void main(String[] args) 
                                  ^
0_0_26251799_8581.cpp:18:1: error: expected ';' after class definition
 }
 ^
0_0_26251799_8581.cpp: In static member function 'static void T4::main(int*)':
0_0_26251799_8581.cpp:6:1: error: 'System' was not declared in this scope
 System.out.println("输入0--10000内的数字求和");
 ^
0_0_26251799_8581.cpp:7:1: error: 'Scanner' was not declared in this scope
 Scanner in=new Scanner(System.in);
 ^
0_0_26251799_8581.cpp:9:3: error: 'in' was not declared in this scope
 n=in.nextInt();
   ^