View Compilation Error

0_0_6765549_6563\Main.java:6: cannot find symbol
symbol  : class Scanner
location: class Main
    	Scanner cin = new Scanner(new BufferedInputStream(System.in));
    	^
0_0_6765549_6563\Main.java:6: cannot find symbol
symbol  : class Scanner
location: class Main
    	Scanner cin = new Scanner(new BufferedInputStream(System.in));
    	                  ^
0_0_6765549_6563\Main.java:18: cannot find symbol
symbol  : variable Arrays
location: class Main
    		Arrays.sort(hdu);
    		^
0_0_6765549_6563\Main.java:19: cannot find symbol
symbol  : variable Arrays
location: class Main
    		Arrays.sort(jdog);
    		^
4 errors