Question

JAVA getting the following errors:

Project4.java:93: error: ']' expected
arr[index] = newVal; // LEAVE THIS HERE. DO NOT REMOVE
^
Project4.java:93: error: ';' expected
arr[index] = newVal; // LEAVE THIS HERE. DO NOT REMOVE
^
Project4.java:93: error: <identifier> expected
arr[index] = newVal; // LEAVE THIS HERE. DO NOT REMOVE
^
Project4.java:94: error: illegal start of type
return true;
^
Project4.java:98: error: class, interface, or enum expected
static int bSearch(int[] a, int count, int key)
^
Project4.java:101: error: class, interface, or enum expected
while(x <= j)
^
Project4.java:105: error: class, interface, or enum expected
if(k[i] == key)
^
Project4.java:108: error: class, interface, or enum expected
}
^
Project4.java:112: error: class, interface, or enum expected
}
^
Project4.java:116: error: class, interface, or enum expected
}
^
Project4.java:119: error: class, interface, or enum expected
}
^
11 errors

MY CODE:

import java.util.*;
import java.io.*;

public class Project4
{
static final int INITIAL_CAPACITY = 5;
  
public static void main( String args[] ) throws Exception
{
if (args.length < 1 )
{
System.out.println("ERROR: Must put input filename on cmd line\n");
System.exit(0);
}
  
Scanner infile = new Scanner( new File( args[0] ) );

int[] arr = new int[INITIAL_CAPACITY];
int count= 0;

while ( infile.hasNextInt() )
{
if ( count==arr.length ) arr = upSizeArr(arr);
if (insertInOrder( arr, count, infile.nextInt() ) )
       ++count;
}
  
arr=trimArr(arr,count); // Now count == .length
printArray( arr ); // we trimmed it thus count == length so we don't bother to pass in count
  
}
  
// ############################################################################################################
  
static void printArray( int[] arr )
{
for( int i=0 ; i<arr.length ;++i )
           System.out.print(arr[i] + " " );
System.out.println();
}
  
static int[] upSizeArr( int[] fullArr )
{
int[] upSizedArr = new int[ fullArr.length * 2 ];
for ( int i=0; i<fullArr.length ; ++i )
           upSizedArr[i] = fullArr[i];
return upSizedArr;
}
  
static int[] trimArr( int[] oldArr, int count )
{
int[] trimmedArr = new int[ count ];
for ( int i=0; i<count ; ++i )
           trimmedArr[i] = oldArr[i];
return trimmedArr;
}
  
// REMOVE ALL COMMENTS FROM INSERT IN ORDER JUST BEFORE HANDIN
static boolean insertInOrder( int[] arr, int count, int newVal )
{
int index = bSearch( arr, count, newVal); // REPLACE WITH -YOUR- BSEARCH

       if ( index >= 0 ) return false;
       boolean negative = false;
       for(int x = o; x < count; x++)
       {
           if(arr[x] >=newVal)
           {
               index = x;
               negative = true;
               break;
           }
       }
       if(negative)
       {
           for(int x = count; x > index; x--)
           {
               arr[x] = arr[x-1];
           }
          
       }
       else
       {
           index = count;
       }
       arr [index] = newVal;
       return true;
   }
arr[index] = newVal; // LEAVE THIS HERE. DO NOT REMOVE
       return true;
}
  
// REMOVE ALL COMMENTS FROM BSEARCH JUST BEFORE HANDIN
static int bSearch(int[] a, int count, int key)
{
       int x = 0, j= count-1;
       while(x <= j)
       {
           int i = x + (j-x)/2;
          
           if(k[i] == key)
           {
               return i;
           }
           if(k[i] < key)
           {
               x = i + 1;  
           }
           else
           {
               j=i -1;
           }
       }
return -1;
}
}

INPUT:

100 89 65 46 32 90 50 38 67 71 42 92 99 57 90 89 98 34 85 19 60 15 99 79 57

Expected OUtput:

15 19 32 34 38 42 46 50 57 60 65 67 71 79 85 89 90 92 98 99 100

The help is appreciated

Answer 1

Dear Student,

Thanks for posting an interesting question to remove the errors you are getting while compiling above program.

1. While compilng the above program I was also getting the exactly the same error which you have shared. Please find below error screenshot for the same.

G. C:\Windows\system32\cmd.exe DO X D:\>javac Project4.java Project4.java:89: error: 'l' expected arr[index] = newal; // LEAVE THIS HERE. DO NOT REMOUE Project4.java:89: error: 'F' expected arr[index] - newal; // LEAVE THIS HERE. DO NOT REMOUE Project4.java:89: error: <identifier> expected arr[index] = newal; // LEAVE THIS HERE. DO NOT REMOUE Project4.java:90: error: illegal start of type return true; Proiect4.java:94: error: class, interface, or enum expected static int bSearch(int[] a, int count, int key Project4.java:97: error: class, interface, or enum expected while(x <= j) Project4.java:101: error: class, interface, or enum expected if (k[i] == key) Project4.java:104: error: class, interface, or enum expected Project4.java:108: error: class, interface, or enum expected Project4.java:112: error: class, interface, or enum expected Project4.java:115: error: class, interface, or enum expected 11 errors

2. After debugging the above program I figure out that your code require four changes.

3. The four changes I made in the code are present at Line No 65, Line No 85, Line No 101 and Line No 105. I put remarks infront of those line numbers what changes I made.

Note:- Don't confuse with the Line Numbers. You can see the line numbers in the below screenshot of the program. I also put remarks infront of the each of the line which require changes.

(a) At line no 65 the change I did is that you have initialized x with alphabet o rather than zero (0). So, please initialize it with 0.

(b) At Line No 85 the change I did is to remove the extra curly braces which is present over there. I commented out that curly braces or if you want you can remove it too.

(c) At Line No 101 the change I did is that we are getting array in variable a not in variable k. So please use variable a for array at if conditoin.

(d) At Line No 105 the change is similar for use variable a instead of k at if condition.

4. I put remarks starting with *MyComment infront of each change.

5. Please find below complete screenshot of the program with proper comments at each of the line where I made changes:-

3 tô - import java.util.*; import java.io.*; 1 2 4 5 public class Project 4 { static final int INITIAL CAPACITY = 5; 0 4 public static void main(String args[] ) throws Exception 6 LỌ CÓ - if (args.length < 1) - - - System.out.println("ERROR: Must put input filename on cmd line\n"); System.exit(0); Scanner infile = new Scanner( new File( args[0] ) ); - - - - - 8 нор со 50 л во - - Ν Ν Ν int[] arr = new int[INITIAL CAPACITY]; int count= 0; while ( infile.hasNextInt()) Ν Ν if ( countr-arr.length) arr = upSizeArr(arr); if (insertInOrder( arr, count, infile.nextInt())) ++count; Ν Ν р 01 (л Ν Ο mar unt. // NAG-Ant -- Tanath

arr=trimArr(arr,count); // Now count == .length printArray( arr); // we trimmed it thus count == length so we don't bother to pass in count // ############################################################################################################ W NOC WWW WWWWW NN on о воо со static void printArray( int[] arr ) for(int i=0; i<arr.length ;++i) System.out.print (arr[i] + " "); System.out.println(); static int[] upsizeArr( int[] fullArr ) E int[] upsizedArr = new int[ fullArr.length * 2 ); for (int i=0; i<fullArr.length; ++i) upsizedArr[i] = fullArr[i]; return upsizedArr; unum um Фоноо со о л static int[] trimArr( int[] oldArr, int count) int[] trimmedArr = new int[ count ]; for (int i=0; i<count ; ++i) trimmedArr[i] = oldArr[i];

return trimmedArr; coon // REMOVE ALL COMMENTS FROM INSERT IN ORDER JUST BEFORE HANDIN static boolean insertInOrder( int[] arr, int count, int newval) 60 int index = bSearch( arr, count, newval); // REPLACE WITH -YOUR- BSEARCH if ( index >= 0 ) return false; boolean negative = false; for (int x = 0; x< count; x++) //*MyComment first change initialize x with 0 rather than alphabet o if(arr[x] >=newval) index = x; negative = true; break; if(negative) for (int x = count; x > index; x--) arr[x] = arr[x-1);

else index = count; //}//*MyComment second change comment this closing braces or remove this curly braces arr [index] = newval; return true; ол во мнор со толь arr[index] = newval; // LEAVE THIS HERE. DO NOT REMOVE return true; // REMOVE ALL COMMENTS FROM BSEARCH JUST BEFORE HANDIN static int bSearch(int[] a, int count, int key) 97 int x = 0, j= count-1; while(x <= j) 98 int i = x + (j-x)/2; 100 101 if(a[i] == key) //*MyComment third change use array a instead of array k return i; 102 103 104 105 106 107 108 if(a[i] <key) // *My Comment fourth change use array a instead of array k x = i + 1;

6. Please find complete program in text format with proper comments at each of the line where I made changes:-

import java.util.*;
import java.io.*;

public class Project4
{
   static final int INITIAL_CAPACITY = 5;

   public static void main( String args[] ) throws Exception
   {
       if (args.length < 1 )
       {
           System.out.println("ERROR: Must put input filename on cmd line\n");
           System.exit(0);
       }

       Scanner infile = new Scanner( new File( args[0] ) );

       int[] arr = new int[INITIAL_CAPACITY];
       int count= 0;

       while ( infile.hasNextInt() )
       {
           if ( count==arr.length ) arr = upSizeArr(arr);
           if (insertInOrder( arr, count, infile.nextInt() ) )
               ++count;
       }

       arr=trimArr(arr,count); // Now count == .length
       printArray( arr ); // we trimmed it thus count == length so we don't bother to pass in count

   }

   // ############################################################################################################

   static void printArray( int[] arr )
   {
       for( int i=0 ; i<arr.length ;++i )
           System.out.print(arr[i] + " " );
       System.out.println();
   }

   static int[] upSizeArr( int[] fullArr )
   {
       int[] upSizedArr = new int[ fullArr.length * 2 ];
       for ( int i=0; i<fullArr.length ; ++i )
           upSizedArr[i] = fullArr[i];
       return upSizedArr;
   }

   static int[] trimArr( int[] oldArr, int count )
   {
       int[] trimmedArr = new int[ count ];
       for ( int i=0; i<count ; ++i )
           trimmedArr[i] = oldArr[i];
       return trimmedArr;
   }

   // REMOVE ALL COMMENTS FROM INSERT IN ORDER JUST BEFORE HANDIN
   static boolean insertInOrder( int[] arr, int count, int newVal )
   {
       int index = bSearch( arr, count, newVal); // REPLACE WITH -YOUR- BSEARCH

       if ( index >= 0 ) return false;
       boolean negative = false;
       for(int x = 0; x < count; x++) //*MyComment first change initialize x with 0 rather than alphabet o
       {
           if(arr[x] >=newVal)
           {
               index = x;
               negative = true;
               break;
           }
       }
       if(negative)
       {
           for(int x = count; x > index; x--)
           {
               arr[x] = arr[x-1];
           }

       }
       else
       {
           index = count;
           //}//*MyComment second change comment this closing braces or remove this closing curly braces
           arr [index] = newVal;
           return true;
       }
       arr[index] = newVal; // LEAVE THIS HERE. DO NOT REMOVE
       return true;
   }

   // REMOVE ALL COMMENTS FROM BSEARCH JUST BEFORE HANDIN
   static int bSearch(int[] a, int count, int key)
   {
       int x = 0, j= count-1;
       while(x <= j)
       {
           int i = x + (j-x)/2;

           if(a[i] == key) //*MyComment third change use array a instead of array k
           {
               return i;
           }
           if(a[i] < key) //*MyComment fourth change use array a instead of array k
           {
               x = i + 1;
           }
           else
           {
               j=i -1;
           }
       }
       return -1;
   }
}

7. Please find below output screenshot of the program.

Note:- Please keep in mind that you are reading the numbers from a file. Hence, I place all the above numbers inside a text file called input.txt and place this file at the same location where our Project4.java file is present. While running the program I am giving the name of the file input.txt as the command line arguments.

C. C:\Windows\system32\cmd.exe D:\>javac Project4.java D:\>java Project input.txt 15 19 32 34 38 42 46 50 57 60 65 67 71 79 85 89 90 92 98 99 100 D:\>

8. In the above output screenshot you can see that we are getting the same output what you are expecting as mentioned in the question.

9. Though I put comments and tried to explain each of the changes. Still if you have any query please feel free to reach me through comments section. I will be more than happy to help you.

10. If you like my answer, please upvote it by pressing thumb's up.

Thanks!!

Happy Learning!!