binarySearch() for Arrays class is generating error code in scjp6 book

[Vishal Hegde]

binarySearch() for Arrays class is generating error code in scjp6 book and i typed the same code then also i am getting bunch of errors below is the code

import java.util.*;

class SearchObjArray
{
  public static void main(String args[])
  {
     String [] sa={"one","two","three","four"};
     Arrays.sort(sa);
     			for(String s:sa)
 			
				System.out.print(s+"");
 System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
 System.out.println("Now reverse sort");

 Arrays.sort(sa,rs);
ReSortComparator rs=new ReSortComparator();
for(String s:sa)
System.out.println(s+" ");
System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
System.out.println("one="+Arrays.binarySearch(sa,"one",rs));
  }
static class ReSortComparator implements Comparator<String>
{
   public int compare(String a,String b)
   {
     return b.compareTo(a);
   }
}

}

and below is the error message i get

D:\Workshop\Java Dept>javac SearchObjArray.java
SearchObjArray.java:8: cannot find symbol
symbol  : method sort(java.lang.String[])
location: class Arrays
     Arrays.sort(sa);
           ^
SearchObjArray.java:12: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.St
location: class Arrays
 System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
                                    ^
SearchObjArray.java:15: cannot find symbol
symbol  : variable rs
location: class SearchObjArray
 Arrays.sort(sa,rs);
                ^
SearchObjArray.java:19: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.St
location: class Arrays
System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
                                   ^
SearchObjArray.java:20: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.St
.ReSortComparator)
location: class Arrays
System.out.println("one="+Arrays.binarySearch(sa,"one",rs));
                                ^
5 errors

why am i gettting the error i have imported java.util.* ???

[John Jai]

Are you sure you ran the same class? I got only one error - symbol not found 'rs' and swapping these two lines fixed it.

Arrays.sort(sa,rs);  
ReSortComparator rs=new ReSortComparator();

[Vishal Hegde]

Still getting the same 5 errors

D:\Workshop\Java Dept>javac SearchObjArray.java
SearchObjArray.java:8: cannot find symbol
symbol  : method sort(java.lang.String[])
location: class Arrays
     Arrays.sort(sa);
           ^
SearchObjArray.java:13: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.String)
location: class Arrays
 System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
                                    ^
SearchObjArray.java:16: cannot find symbol
symbol  : method sort(java.lang.String[],SearchObjArray.ReSortComparator)
location: class Arrays
 Arrays.sort(sa,rs);
       ^
SearchObjArray.java:20: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.String)
location: class Arrays
System.out.println("\none= "+Arrays.binarySearch(sa,"one"));
                                   ^
SearchObjArray.java:21: cannot find symbol
symbol  : method binarySearch(java.lang.String[],java.lang.String,SearchObjArray
.ReSortComparator)
location: class Arrays
System.out.println("one="+Arrays.binarySearch(sa,"one",rs));
                                ^
5 errors

[Campbell Ritchie]

That is probably because you have an Arrays class of your own in the same directory. Try using the fully-qualified name java.util.Arrays instead of Arrays throughout.